Q: Is 216,409 a Prime Number?
A: No, 216,409 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 216409 can be evenly divided by 1 379 571 and 216,409, with no remainder.
Since 216,409 cannot be divided by just 1 and 216,409, it is not a prime number.