### About the Number 233 (two hundred thirty-three)

MathBabbler is creating nBABs for the numbers in the Fibonacci sequence and the next Fibonacci number that he didn't have a nBAB for was `233`.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
233 is a natural, whole, integer
233 is odd
233 proper divisors are: 1,
233 is deficient (sum of divisors is 1)
233 is unhappy
233 is not a Harshad number
233 is prime
...Cousin prime with 229
...Sexy prime with 239
...Sexy prime with 227
...Sophie Germain prime with 467
...Pythagorean
...Right-truncatable
...prime triplet {227, 229, 233}
233 is a Fibonacci number
233 in octal is 0351
233 in hexadecimal is 0xe9
233 in binary is 11101001 (is odious)
233 nearest square numbers: -8...23 (225...256 )
sqrt(233) = 15.2643
ln(233) = 5.45104
log(233) = 2.36736
233 reciprocal is .00429184549356223175965665236051
233! is 9.6881e+451
233 is 74.1662 Pi years
233 is 11 score and 13 years
233 written as a Roman numeral is CCXXXIII
```

`[Wikipedia]` `233` is an Eisenstein prime because it is of the form 3n - 1.

The first Eisenstein primes are...

```   2, 5, 11, 17, 23, 29, 41, 47, 53, 59, 71, 83, 89, 101...
```

OEIS.org::id:A003627

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 04 April 2009 