Q: Is 213,521 a Prime Number?
A: No, 213,521 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 213521 can be evenly divided by 1 7 11 47 59 77 329 413 517 649 2,773 3,619 4,543 19,411 30,503 and 213,521, with no remainder.
Since 213,521 cannot be divided by just 1 and 213,521, it is not a prime number.