157 (one hundred [and] fifty-seven) is the number following 156 and preceding 158.

In mathematics

157 is:

• the 37th prime number. The next prime is 163 and the previous prime is 151.
• a balanced prime, because the arithmetic mean of those primes yields 157.
• an emirp.
• a Chen prime.
• the largest known prime p which ${\displaystyle {\frac {p^{p}+1}{p+1))}$ is also prime. (see OEIS: A056826).
• the least irregular prime with index 2.
• a palindromic number in bases 7 (313₇) and 12 (111₁₂).
• a repunit in base 12, so it is a unique prime in the same base.
• a prime whose digits sum to a prime. (see OEIS: A046704).
• a prime index prime.

In base 10, 157² is 24649, and 158² is 24964, which uses the same digits. Numbers having this property are listed in OEIS: A072841. The previous entry is 13, and the next entry after 157 is 913.

The simplest right angle triangle with rational sides that has area 157 has the longest side with a denominator of 45 digits.

In the military

• USCGC Cuyahoga (WIX-157) was a United States Coast Guard cutter built in 1926
• USNS Paoli (T-AO-157) was a United States Navy Type T2 tanker during World War II
• USS Alcona (AK-157) was a United States Navy Alamosa-class cargo ship during World War II
• USS Caravan (AM-157) was a United States Navy Admirable-class minesweeper during World War II
• USS Dickerson (DD-157) was a United States Navy Wickes-class destroyer during World War II
• USS Fechteler (DE-157) was a United States Navy Buckley-class destroyer escort during World War II
• USS General C. C. Ballou (AP-157) was a United States Navy General G. O. Squier-class transport ship during World War II
• USS King County (AG-157) was a United States Navy LST-542-class tank landing ship during World War II
• USS Napa (APA-157) was a United States Navy ship during World War II
• USS Orvetta (IX-157) was a United States Navy transport military ship during World War II
• USS Remlik (SP-157) was a United States Navy yacht during World War I
• ZIL-157 is a 2.5-ton truck produced in post-World War II Russia

In music

• "157 Riverside Avenue" is a song by REO Speedwagon from their debut album, REO Speedwagon in 1971. Its title refers to a Westport, Connecticut address where the band stayed while recording it.
• Piano Sonata No. 1 in E major, D. 157 is a piano sonata in three movements by Franz Schubert.
• "157" is a song by Tom Rosenthal where the lyrics merely consist of the numbers from 1 to 157. The song was released on April Fools' Day, 2020.

In sports

• Ken Carpenter held the US record in discus, and won the NCAA national title with a toss of 157 feet in 1936.
• Steph Curry of the Golden State Warriors holds the NBA record for 157 consecutive games with a 3-point field goal made (from November 13, 2014 to November 4, 2016).

In transportation

• The British Rail Class 157 was the designation for a range of Diesel multiple unit trains of the Sprinter family
• London Buses route 157
• American Airlines Flight 157 from New York City bound for Mexico City crashed on November 29, 1949
• 157th Street (IRT Broadway – Seventh Avenue Line), a New York City Subway station at Broadway in Manhattan served by the 1 train
• 157th Street (Manhattan), a street in New York City

In other fields

157 is also:

• The year AD 157 or 157 BC
• 157 AH is a year in the Islamic calendar that corresponds to 773–774 CE
• The atomic number of an element temporarily called Unpentseptium.^[1]
• 157 Dejanira is a main belt asteroid
• O157, Escherichia coli O157:H7
• Financial Accounting Standards Board Statement No. 157 defines fair value^[2]
• South Qu'appelle No. 157, Saskatchewan is a rural municipality in Saskatchewan, Canada
• United States Department of State Form DS-157 is Supplemental Nonimmigrant Visa Application^[3]
• One57, a partially completed skyscraper at 157 West 57th Street in New York City, on which the crane partially collapsed during Hurricane Sandy