About the Number 212 (two hundred twelve)

MathBabbler's two grandkids were born day 212 of year 2009 (i.e. 31 July 2009 [which is a Pi Approximation BAD because (31-9)/7 approximates Pi]).

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   212 is a natural, whole, integer
   212 is even
   212 proper divisors are: 1,2,4,53,106,
   212 is deficient (sum of divisors is 166)
   212 is unhappy
   212 is not a Harshad number
   212 is not prime
   212 has the prime factors: 2*2*53 (sum=57)
   212 sum of prime factors is: 57
   212 is undulating
   212 is palindromic
   212 in octal is 0324
   212 in hexadecimal is 0xd4
   212 in binary is 11010100 (is evil)
   212 nearest square numbers: -16...13 (196...225 [15])
   sqrt(212) = 14.5602
   ln(212) = 5.35659
   log(212) = 2.32634
   212 reciprocal is .00471698113207547169811320754716
   212! is 4.7337e+402
   212 is 67.4817 Pi years
   212 is 10 score and 12 years
   212 written as a Roman numeral is CCXII

212°F is the boiling point of water at sea level.

[Wikipedia.org] 212 is a Zuckerman number. A Zuckerman number is "an integer that is divisible by the product of its digits in a given number base."

   212 in base-10 has the digits 2, 1, 2
   the product of the digits is 2 * 1 * 2 = 4
   4 is a proper divisor (factor) of 212

Observe...

   sqrt(212) / ln(212) = 2.71819
   e = 2.71828183

   square-root of 212 divided-by its natural log
   approximates 'e' rounded to the nearest thousandth

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 31 July 2009

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