This nBAB for the number

`was created after nBAB#`

321`was created for the number 1464 on 25 January 2010. This nBAB about the number`

321`was is nBAB 322 and there was already a nBAB for the number 322.`

321MathBabbler Number Analyst (MBNA) output: ========================================= 321 is a natural, whole, integer 321 is odd 321 proper divisors are: 1,3,107, 321 is deficient (sum of divisors is 111) 321 is unhappy 321 is not a Harshad number 321 is not prime 321 has the prime factors: 3*107 (sum=110) 321 is semiprime (biprime or 2-almost prime) 321 sum of prime factors is: 110 321 is a lucky number 321 in octal is 0501 321 in hexadecimal is 0x141 321 in binary is 101000001 (is odious) 321 nearest square numbers: -32...3 (289...324 [18]) sqrt(321) = 17.9165 ln(321) = 5.77144 log(321) = 2.50651 321 reciprocal is .00311526479750778816199376947040 321! is 6.79269e+666 321 is 102.177 Pi years 321 is 16 score and 1 year 321 written as a Roman numeral is CCCXXI

`= 161^2 - 160^2 and 161 + 160 = 321`

321It is quick to check that

`is a multiple of three because the sum of its digits is six and six is a multiple of three.`

321

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

**Created:** 25 January 2010

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