Q: Is 21,442,575 a Composite Number?

Why is 21,442,575 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 21,442,575 can be evenly divided by 1 3 5 7 11 15 21 25 33 35 47 55 75 77 79 105 141 165 175 231 235 237 275 329 385 395 517 525 553 705 825 869 987 1,155 1,175 1,185 1,551 1,645 1,659 1,925 1,975 2,585 2,607 2,765 3,525 3,619 3,713 4,345 4,935 5,775 5,925 6,083 7,755 8,225 8,295 10,857 11,139 12,925 13,035 13,825 18,095 18,249 18,565 21,725 24,675 25,991 30,415 38,775 40,843 41,475 54,285 55,695 65,175 77,973 90,475 91,245 92,825 122,529 129,955 152,075 204,215 271,425 278,475 285,901 389,865 456,225 612,645 649,775 857,703 1,021,075 1,429,505 1,949,325 3,063,225 4,288,515 7,147,525 and 21,442,575, with no remainder.

Since 21,442,575 cannot be divided by just 1 and 21,442,575, 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).