Q: Is 321,021,225 a Composite Number?

Why is 321,021,225 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 321,021,225 can be evenly divided by 1 3 5 7 9 15 21 25 27 35 45 63 75 81 105 135 175 189 225 243 315 405 525 567 675 945 1,215 1,575 1,701 2,025 2,835 4,725 6,075 7,549 8,505 14,175 22,647 37,745 42,525 52,843 67,941 113,235 158,529 188,725 203,823 264,215 339,705 475,587 566,175 611,469 792,645 1,019,115 1,321,075 1,426,761 1,698,525 1,834,407 2,377,935 3,057,345 3,963,225 4,280,283 5,095,575 7,133,805 9,172,035 11,889,675 12,840,849 15,286,725 21,401,415 35,669,025 45,860,175 64,204,245 107,007,075 and 321,021,225, with no remainder.

Since 321,021,225 cannot be divided by just 1 and 321,021,225, 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).