About the Number 251 (two hundred fifty-one)

RoadHacker went home for his dad's birthday during late-June of 2012 and he did some road tripping on IL Hwy-251. He never once thought about the number 251 being a prime number.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   251 is a natural, whole, integer
   251 is odd
   251 proper divisors are: 1,
   251 is deficient (sum of divisors is 1)
   251 is unhappy
   251 is a Squarefree Number
   251 is not a Harshad number
   251 is prime
   ...Sexy prime with 257
   ...Sophie Germain prime with 503
   ...Truman Gerald prime with 281
   ...OEIS:002145 (4n+3; n=62)
   ...Eisenstein
   251 is the sum of 7 consecutive primes
   251 = 23 + 29 + 31 + 37 + 41 + 43 + 47
   251 in octal is 0373
   251 in hexadecimal is 0xfb
   251 in binary is 11111011 (is odious)
   251 nearest square numbers: -26...5 (225...256 [16])
   sqrt(251) = 15.843
   ln(251) = 5.52545
   log(251) = 2.39967
   251 reciprocal is .00398406374501992031872509960159
   251 is an apocalyptic power
   251! is 8.11447e+494
   251 is 79.8958 Pi years
   251 is 12 score and 11 years
   251 written as a Roman numeral is CCLI
   251 = 126^2 - 125^2 and 126 + 125 = 251

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 27 June 2012

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