### 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 )
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 