Q: Is 221,409 a Prime Number?
A: No, 221,409 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 221409 can be evenly divided by 1 3 9 73 219 337 657 1,011 3,033 24,601 73,803 and 221,409, with no remainder.
Since 221,409 cannot be divided by just 1 and 221,409, it is not a prime number.