Q: Is 187,221 a Prime Number?
A: No, 187,221 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 187221 can be evenly divided by 1 3 17 51 3,671 11,013 62,407 and 187,221, with no remainder.
Since 187,221 cannot be divided by just 1 and 187,221, it is not a prime number.