Q: Is 221,424 a Prime Number?
A: No, 221,424 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 221424 can be evenly divided by 1 2 3 4 6 7 8 12 14 16 21 24 28 42 48 56 84 112 168 336 659 1,318 1,977 2,636 3,954 4,613 5,272 7,908 9,226 10,544 13,839 15,816 18,452 27,678 31,632 36,904 55,356 73,808 110,712 and 221,424, with no remainder.
Since 221,424 cannot be divided by just 1 and 221,424, it is not a prime number.