Charles Babbage would have turn

221 years oldon 26 December 2012.MathBabbler Number Analyst (MBNA) output: ========================================= 221 is a natural, whole, integer 221 is odd 221 proper divisors are: 1,13,17, 221 is deficient (sum of divisors is 31) 221 is unhappy 221 is a Squarefree Number 221 is not a Harshad number 221 is not prime 221 has the prime factors: 13*17 (sum=30) 221 is semiprime (biprime or 2-almost prime) 221 sum of prime factors is: 30 221 is the sum of 9 consecutive primes 221 = 11 + 13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 221 in octal is 0335 221 in hexadecimal is 0xdd 221 in binary is 11011101 (is evil) 221 nearest square numbers: -25...4 (196...225 [15]) sqrt(221) = 14.8661 ln(221) = 5.39816 log(221) = 2.34439 221 reciprocal is .00452488687782805429864253393665 221! is 5.04733e+423 221 is 70.3465 Pi years 221 is 11 score and 1 year 221 written as a Roman numeral is CCXXI 221 = 111^2 - 110^2 and 111 + 110 = 221

**Creator:** Gerald Thurman
[gthurman@gmail.com]

**Created:** 26 December 2012 (posted 02 May 2013)

This work is licensed under a Creative Commons Attribution 3.0 United States License.