Q: Is 21,811,335 a Composite Number?

Why is 21,811,335 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 21,811,335 can be evenly divided by 1 3 5 7 13 15 19 21 29 35 39 57 65 87 91 95 105 133 145 195 203 247 273 285 377 399 435 455 551 609 665 741 841 1,015 1,131 1,235 1,365 1,653 1,729 1,885 1,995 2,523 2,639 2,755 3,045 3,705 3,857 4,205 5,187 5,655 5,887 7,163 7,917 8,265 8,645 10,933 11,571 12,615 13,195 15,979 17,661 19,285 21,489 25,935 29,435 32,799 35,815 39,585 47,937 50,141 54,665 57,855 76,531 79,895 88,305 107,445 111,853 150,423 163,995 207,727 229,593 239,685 250,705 335,559 382,655 559,265 623,181 752,115 1,038,635 1,147,965 1,454,089 1,677,795 3,115,905 4,362,267 7,270,445 and 21,811,335, with no remainder.

Since 21,811,335 cannot be divided by just 1 and 21,811,335, 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).