Q: Is 21,772 a Prime Number?
A: No, 21,772 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 21772 can be evenly divided by 1 2 4 5,443 10,886 and 21,772, with no remainder.
Since 21,772 cannot be divided by just 1 and 21,772, it is not a prime number.