Q: Is 210,321,155 a Prime Number?

 A: No, 210,321,155 is not a prime number.

Why is 210,321,155 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 210321155 can be evenly divided by 1 5 11 55 131 655 1,441 7,205 29,191 145,955 321,101 1,605,505 3,824,021 19,120,105 42,064,231 and 210,321,155, with no remainder.

Since 210,321,155 cannot be divided by just 1 and 210,321,155, it is not a prime number.


More Examples

  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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