Primes / Is 321 prime?

Is 321 a Prime Number?

No321 = 3 x 107

321 is NOT prime: 3 × 107 = 321. That makes 3 a genuine divisor of 321 beyond 1 and 321 itself. Fully broken down, 321 = 3 × 107, for 4 divisors total. 321 sits between primes 317 and 331, 4 below and 10 above. 321: 3 divide 321 evenly, checked against 2-12. 321 is odd, digit sum 6 for 321, digital root 6 for 321. 321 has 4 primes within 10 of 321.