Q: Is 318,221 a Prime Number?
A: No, 318,221 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 318221 can be evenly divided by 1 223 1,427 and 318,221, with no remainder.
Since 318,221 cannot be divided by just 1 and 318,221, it is not a prime number.