About the Number 22 (twenty-two)

The number 22 is used a lot when doing BARS (Basic Arithmetic Road Signs). The fraction 22/7 is ofen used to approximate Pi.

   MathBabbler Number Analyst (MBNA) output:
   =========================================
   22 is a natural, whole, integer
   22 is even
   22 proper divisors are: 1,2,11,
   22 is deficient (sum of divisors is 14)
   22 is unhappy
   22 is not a Harshad number
   22 is not prime
   22 has the prime factors: 2*11
   22 is semiprime (biprime or 2-almost prime)
   22 sum prime factors: 2...11...answer: 13
   22 is undulating
   22 is palindromic
   22 in octal is 026
   22 in hexadecimal is 0x16
   22 in binary is 10110 (is odious)
   22 nearest square numbers: -6...3 (16...25 [5])
   sqrt(22) = 4.69042
   ln(22) = 3.09104
   log(22) = 1.34242
   22 reciprocal is .04545454545454545454545454545454
   22! is 1.124e+21
   22 is 7.00282 Pi years
   22 is 1 score and 2 years
   22 written as a Roman numeral is XXII

22 is a Smith number because the sum of its digits is equal to the sum of the digits of its prime factors.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 13 April 2009 (posted 17 April 2009)