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 [16])
   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

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