This nBAB for the number

`was created because`

131`, at the time, was the smallest number without a nBAB.`

131MathBabbler Number Analyst (MBNA) output: ========================================= 131 is a natural, whole, integer 131 is odd 131 proper divisors are: 1, 131 is deficient (sum of divisors is 1) 131 is unhappy 131 is not a Harshad number 131 is prime ...Cousin prime with 127 ...Sexy prime with 137 ...Sophie Germain prime with 263 ...OEIS:002145 (4n+3; n=32) ...Left-truncatable ...Right-truncatable ...Eisenstein 131 is undulating 131 is palindromic 131 is the sum of 3 consecutive primes 41 + 43 + 47 131 in octal is 0203 131 in hexadecimal is 0x83 131 in binary is 10000011 (is odious) 131 nearest square numbers: -10...13 (121...144 [12]) sqrt(131) = 11.4455 ln(131) = 4.8752 log(131) = 2.11727 131 reciprocal is .00763358778625954198473282442748 131! is 8.47158e+221 131 is 41.6986 Pi years 131 is 6 score and 11 years 131 written as a Roman numeral is CXXXI

`is a triple-X Roman numeral.`

131

`[NumDic.com]`

`is the difference of two squares (66^2 - 65^2).`

131

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 07 December 2009

This work is licensed under a Creative Commons Attribution 3.0 United States License.