Q: Is 21,602,009 a Prime Number?

 A: No, 21,602,009 is not a prime number.

Why is 21,602,009 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 21602009 can be evenly divided by 1 11 13 31 121 143 341 403 443 1,573 3,751 4,433 4,873 5,759 13,733 48,763 53,603 63,349 151,063 178,529 696,839 1,661,693 1,963,819 and 21,602,009, with no remainder.

Since 21,602,009 cannot be divided by just 1 and 21,602,009, 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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