### 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 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)