Q: Is 520,221 a Prime Number?
A: No, 520,221 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 520221 can be evenly divided by 1 3 13 39 13,339 40,017 173,407 and 520,221, with no remainder.
Since 520,221 cannot be divided by just 1 and 520,221, it is not a prime number.