### About the Number 131 (one hundred thirty-one)

This nBAB for the number `131` was created because `131`, at the time, was the smallest number without a nBAB.

```   MathBabbler 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 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
```

`131` is a triple-X Roman numeral.

`[NumDic.com]` `131` is the difference of two squares (66^2 - 65^2).

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 December 2009