Q: Is 221,987 a Prime Number?
A: Yes, 221,987 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 221987 can be evenly divided by 1 and 221,987, with no remainder.
Since 221,987 can be divided by just 1 and 221,987, it is a prime number.