Q: Is 221,563 a Prime Number?
A: No, 221,563 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 221563 can be evenly divided by 1 149 1,487 and 221,563, with no remainder.
Since 221,563 cannot be divided by just 1 and 221,563, it is not a prime number.