Q: Is 21,681,675 a Composite Number?

Why is 21,681,675 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 21,681,675 can be evenly divided by 1 3 5 9 15 25 27 43 45 75 81 83 129 135 215 225 243 249 387 405 415 645 675 747 1,075 1,161 1,215 1,245 1,935 2,025 2,075 2,241 3,225 3,483 3,569 3,735 5,805 6,075 6,225 6,723 9,675 10,449 10,707 11,205 17,415 17,845 18,675 20,169 29,025 32,121 33,615 52,245 53,535 56,025 87,075 89,225 96,363 100,845 160,605 168,075 261,225 267,675 289,089 481,815 504,225 803,025 867,267 1,445,445 2,409,075 4,336,335 7,227,225 and 21,681,675, with no remainder.

Since 21,681,675 cannot be divided by just 1 and 21,681,675, 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).