Q: Is 21,228,102 a Composite Number?

Why is 21,228,102 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 21,228,102 can be evenly divided by 1 2 3 6 7 9 14 18 21 27 42 54 63 89 126 178 189 267 378 534 623 631 801 1,246 1,262 1,602 1,869 1,893 2,403 3,738 3,786 4,417 4,806 5,607 5,679 8,834 11,214 11,358 13,251 16,821 17,037 26,502 33,642 34,074 39,753 56,159 79,506 112,318 119,259 168,477 238,518 336,954 393,113 505,431 786,226 1,010,862 1,179,339 1,516,293 2,358,678 3,032,586 3,538,017 7,076,034 10,614,051 and 21,228,102, with no remainder.

Since 21,228,102 cannot be divided by just 1 and 21,228,102, 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).