This nBAB for the number

181was created on 2 May 2015 because missing nBABs for the numbers in the [168, 198] sequence were being turned into nBABs.181is in the [168, 198] sequence and it didn't have a nBAB.MathBabbler Number Analyst (MBNA) output: ========================================= 181 is a natural, whole, integer 181 is odd 181 proper divisors are: 1, 181 has 1 proper divisors 181 is deficient (sum of divisors is 1; ratio: 0.00552486) 181 is unhappy 181 is a Squarefree Number 181 is prime (not composite) ...Twin prime with 179 ...Truman Gerald prime with 211 ...Truman Gerald prime with 151 ...Pythagorean ...Star ...reversible prime with 181 181 is undulating 181 is centered dodecagonal 181 is palindromic 181 is Arithmetic (A003601) 181 is the sum of 5 consecutive primes 181 = 29 + 31 + 37 + 41 + 43 181 in octal is 0265 181 in hexadecimal is 0xb5 181 in binary is 10110101 (is odious) 181 nearest square numbers: -12...15 (169...196 [14]) sqrt(181) = 13.4536 ln(181) = 5.1985 log(181) = 2.25768 181 reciprocal is .00552486187845303867403314917127 181! is 3.63622e+331 181 is 57.6141 Pi years 181 is 9 score and 1 year 181 written as a Roman numeral is CLXXXI 181 is 91^2 - 90^2 and 91 + 90 = 181 181 is a multiple of 1 & it contains a 1 (A011531)

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

**Created:** 02 May 2015

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