Q: Is 21,046,311 a Composite Number?

Why is 21,046,311 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 21,046,311 can be evenly divided by 1 3 9 11 13 23 27 33 39 69 79 81 99 117 143 207 237 253 297 299 351 429 621 711 759 869 891 897 1,027 1,053 1,287 1,817 1,863 2,133 2,277 2,607 2,691 3,081 3,289 3,861 5,451 6,399 6,831 7,821 8,073 9,243 9,867 11,297 11,583 16,353 19,987 20,493 23,463 23,621 24,219 27,729 29,601 33,891 49,059 59,961 70,389 70,863 83,187 88,803 101,673 147,177 179,883 212,589 259,831 266,409 305,019 539,649 637,767 779,493 915,057 1,618,947 1,913,301 2,338,479 7,015,437 and 21,046,311, with no remainder.

Since 21,046,311 cannot be divided by just 1 and 21,046,311, 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).