This nBAB for the number

331was created because331was the smallest number that didn't have a nBAB on 5 May 2016. After the posting of this nBAB, 332 became the smallest number without a nBAB.Note: MathBabbler decided on 3 May 2016 that he wanted all numbers less than 350 to have nBABs by the end of the Spring 2016 Semester BABbling session.

MathBabbler Number Analyst (MBNA) output: ========================================= 331 is a natural, whole, integer 331 is odd 331 proper divisors are: 1, 331 has 1 proper divisors 331 is deficient (sum of divisors is 1; ratio: 0.00302115) 331 is happy 331 is a Squarefree Number 331 is prime (not composite) ...Sexy prime with 337 ...Sexy Quadruple prime with 319, 325, 337 ...OEIS:002145 (4n+3; n=82) ...Super (prime# 67) ...Left-truncatable 331 is a lucky number 331 is Arithmetic (A003601) 331 is the sum of 5 consecutive primes 331 = 59 + 61 + 67 + 71 + 73 331 in octal is 0513 331 in hexadecimal is 0x14b 331 in binary is 101001011 (is odious) 331 nearest square numbers: -7...30 (324...361 [19]) sqrt(331) = 18.1934 ln(331) = 5.80212 log(331) = 2.51983 331 reciprocal is .00302114803625377643504531722054 331! is 9.34772e+691 331 is 105.361 Pi years 331 is 16 score and 11 years 331 written as a Roman numeral is CCCXXXI 331 is 166^2 - 165^2 and 166 + 165 = 331 331 is a multiple of 1 & it contains a 1 (A011531)

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

**Created:** 05 May 2016

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