Q: Is 21,263 a Prime Number?
A: No, 21,263 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 21263 can be evenly divided by 1 11 1,933 and 21,263, with no remainder.
Since 21,263 cannot be divided by just 1 and 21,263, it is not a prime number.