Q: Is 616,221 a Prime Number?
A: No, 616,221 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 616221 can be evenly divided by 1 3 9 27 29 87 261 783 787 2,361 7,083 21,249 22,823 68,469 205,407 and 616,221, with no remainder.
Since 616,221 cannot be divided by just 1 and 616,221, it is not a prime number.