Q: Is 21,221,304 a Composite Number?

Why is 21,221,304 a composite number?

A composite number is a number that can be divided evenly by more numbers than 1 and itself. It is the opposite of a prime number.

The number 21,221,304 can be evenly divided by 1 2 3 4 6 8 12 13 17 24 26 34 39 51 52 68 78 102 104 136 156 204 221 312 408 442 663 884 1,326 1,768 2,652 4,001 5,304 8,002 12,003 16,004 24,006 32,008 48,012 52,013 68,017 96,024 104,026 136,034 156,039 204,051 208,052 272,068 312,078 408,102 416,104 544,136 624,156 816,204 884,221 1,248,312 1,632,408 1,768,442 2,652,663 3,536,884 5,305,326 7,073,768 10,610,652 and 21,221,304, with no remainder.

Since 21,221,304 cannot be divided by just 1 and 21,221,304, it is a composite number.

More Examples

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