Q: Is 255,321 a Prime Number?
A: No, 255,321 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 255321 can be evenly divided by 1 3 9 11 33 99 2,579 7,737 23,211 28,369 85,107 and 255,321, with no remainder.
Since 255,321 cannot be divided by just 1 and 255,321, it is not a prime number.