Q: Is 21,755 a Prime Number?
A: No, 21,755 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 21755 can be evenly divided by 1 5 19 95 229 1,145 4,351 and 21,755, with no remainder.
Since 21,755 cannot be divided by just 1 and 21,755, it is not a prime number.