Q: Is 221,988 a Prime Number?
A: No, 221,988 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 221988 can be evenly divided by 1 2 3 4 6 12 13 26 39 52 78 156 1,423 2,846 4,269 5,692 8,538 17,076 18,499 36,998 55,497 73,996 110,994 and 221,988, with no remainder.
Since 221,988 cannot be divided by just 1 and 221,988, it is not a prime number.