Q: Is 21,238 a Prime Number?
A: No, 21,238 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 21238 can be evenly divided by 1 2 7 14 37 41 74 82 259 287 518 574 1,517 3,034 10,619 and 21,238, with no remainder.
Since 21,238 cannot be divided by just 1 and 21,238, it is not a prime number.