Q: Is 510,561 a Prime Number?
A: No, 510,561 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 510561 can be evenly divided by 1 3 9 17 47 51 71 141 153 213 423 639 799 1,207 2,397 3,337 3,621 7,191 10,011 10,863 30,033 56,729 170,187 and 510,561, with no remainder.
Since 510,561 cannot be divided by just 1 and 510,561, it is not a prime number.