Q: Is 221,615 a Prime Number?
A: No, 221,615 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 221615 can be evenly divided by 1 5 127 349 635 1,745 44,323 and 221,615, with no remainder.
Since 221,615 cannot be divided by just 1 and 221,615, it is not a prime number.