Q: Is 8,515,815 a Composite Number?

Why is 8,515,815 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 8,515,815 can be evenly divided by 1 3 5 7 11 15 21 33 35 55 73 77 101 105 165 219 231 303 365 385 505 511 707 803 1,095 1,111 1,155 1,515 1,533 2,121 2,409 2,555 3,333 3,535 4,015 5,555 5,621 7,373 7,665 7,777 10,605 12,045 16,665 16,863 22,119 23,331 28,105 36,865 38,885 51,611 81,103 84,315 110,595 116,655 154,833 243,309 258,055 405,515 567,721 774,165 1,216,545 1,703,163 2,838,605 and 8,515,815, with no remainder.

Since 8,515,815 cannot be divided by just 1 and 8,515,815, 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).