Q: Is 21,625 a Prime Number?
A: No, 21,625 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 21625 can be evenly divided by 1 5 25 125 173 865 4,325 and 21,625, with no remainder.
Since 21,625 cannot be divided by just 1 and 21,625, it is not a prime number.