Q: Is 21,555,324 a Composite Number?

Why is 21,555,324 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 21,555,324 can be evenly divided by 1 2 3 4 6 7 9 12 14 18 21 23 28 36 42 46 63 69 84 92 126 138 161 207 252 276 322 414 483 644 828 966 1,449 1,932 2,898 3,719 5,796 7,438 11,157 14,876 22,314 26,033 33,471 44,628 52,066 66,942 78,099 85,537 104,132 133,884 156,198 171,074 234,297 256,611 312,396 342,148 468,594 513,222 598,759 769,833 937,188 1,026,444 1,197,518 1,539,666 1,796,277 2,395,036 3,079,332 3,592,554 5,388,831 7,185,108 10,777,662 and 21,555,324, with no remainder.

Since 21,555,324 cannot be divided by just 1 and 21,555,324, 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).