About the Number 321 (three hundred twenty-one)

This nBAB for the number 321 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.

   MathBabbler 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

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

It is quick to check that 321 is a multiple of three because the sum of its digits is six and six is a multiple of three.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 25 January 2010