Q: Is 221,539 a Prime Number?
A: Yes, 221,539 is a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 221539 can be evenly divided by 1 and 221,539, with no remainder.
Since 221,539 can be divided by just 1 and 221,539, it is a prime number.