Q: Is 191,521 a Prime Number?
A: No, 191,521 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 191521 can be evenly divided by 1 11 23 253 757 8,327 17,411 and 191,521, with no remainder.
Since 191,521 cannot be divided by just 1 and 191,521, it is not a prime number.