Q: Is 2,215,721 a Prime Number?
A: No, 2,215,721 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 2215721 can be evenly divided by 1 47 47,143 and 2,215,721, with no remainder.
Since 2,215,721 cannot be divided by just 1 and 2,215,721, it is not a prime number.