Q: Is 319,221 a Prime Number?
A: No, 319,221 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 319221 can be evenly divided by 1 3 7 9 21 27 63 81 189 563 567 1,689 3,941 5,067 11,823 15,201 35,469 45,603 106,407 and 319,221, with no remainder.
Since 319,221 cannot be divided by just 1 and 319,221, it is not a prime number.