Superpotential
Template:Examplefarm Template:Infobox number 131 is the natural number following 130 and preceding 132.
In mathematics
131 is a Sophie Germain prime, the second 3-digit palindromic prime, and also a permutable prime with 113 and 311. It can be expressed as the sum of three consecutive primes, 131 = 41 + 43 + 47. 131 is an Eisenstein prime with no imaginary part and real part of the form . Because the next odd number, 133, is a semiprime, 131 is a Chen prime.
131 is a full reptend prime in base 10. The decimal expansion of 1/131 repeats the digits 00763358778625954198473282442748091603053435114503816793893129770992366412213 74045801526717557251908396946564885496183206106870229 indefinitely.
In the military
- Convair C-131 Samaritan was an American military transport produced from 1954 to 1956
- Template:USNS was a Buenaventura-class fleet oiler during World War II
- Template:USS was a is a United States Navy Haskell-class attack transport ship during World War II
- Template:USS was a United States Navy Wickes-class destroyer
- Template:USS was a United States Navy General G. O. Squier transport ship during World War II
- Template:USS was a United States Navy Edsall-class destroyer escort during World War II
- Template:USS was an United States Navy Crater-class cargo ship during World War II
- Template:USS was a ship of the United States Navy during World War II
- Strike Fighter Squadron (VFA-131) is a United States Navy F/A-18C Hornet fighter squadron stationed at Naval Air Station Oceana
- ZIL-131 is a 3.5-ton 6x6 army truck
In sports
- The 131st Belmont Stakes was won by Lemon Drop Kid on June 5, 1999
- The 131st Kentucky Derby was won by Giacomo on May 8, 2005
In transportation
- U.S. Route 131 in Michigan and Indiana
- M-131 is a former state trunkline highway designation replaced by U.S. Route 131 and M-119
- Route 131 in Quebec, Canada
- Highway 131 was a former provincial highway in Simcoe County, Ontario
- London Buses route 131 is a Transport for London contracted bus route in London
- The Fiat 131 Mirafiori small/medium family car produced from 1974 to 1984
- STS-131 is a NASA Contingency Logistic Flight (CLF) of the Space Shuttle Atlantis planned for no earlier than February 2010
In other fields
131 is also:
- The year AD131 or 131 BC
- 131 AH is a year in the Islamic calendar that corresponds to 748 – 749 CE.
- 131 Vala is an inner Main belt asteroid
- Iodine-131, or radioiodine, is a radioisotope of iodine for medical and pharmaceutical use
- ACP-131 is the controlling publication for listing of Q codes and Z codes, as published by NATO Allied countries
- Sonnet 131 by William Shakespeare
- Channel 131 on Sirius Satellite Radio is the Fox News Channel
- Channel 131 on XM Radio is BBC World Service
- 131 is the medical emergency telephone number in Chile
- United States Citizenship and Immigration Services Form I-131 to apply for a travel document, reentry permit, refugee travel document or advance parole
- The 131st Westminster Kennel Club Dog Show was won by Ch. Felicity's Diamond Jim, an English Springer Spaniel on February 13, 2007
- In music, the number 131 serves a moniker for Indie music