Q: Is 521,622 a Prime Number?
A: No, 521,622 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 521622 can be evenly divided by 1 2 3 6 9 18 28,979 57,958 86,937 173,874 260,811 and 521,622, with no remainder.
Since 521,622 cannot be divided by just 1 and 521,622, it is not a prime number.