Q: Is 21,257,700 a Composite Number?

Why is 21,257,700 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 21,257,700 can be evenly divided by 1 2 3 4 5 6 10 12 15 20 25 30 50 59 60 75 100 118 150 177 236 295 300 354 590 708 885 1,180 1,201 1,475 1,770 2,402 2,950 3,540 3,603 4,425 4,804 5,900 6,005 7,206 8,850 12,010 14,412 17,700 18,015 24,020 30,025 36,030 60,050 70,859 72,060 90,075 120,100 141,718 180,150 212,577 283,436 354,295 360,300 425,154 708,590 850,308 1,062,885 1,417,180 1,771,475 2,125,770 3,542,950 4,251,540 5,314,425 7,085,900 10,628,850 and 21,257,700, with no remainder.

Since 21,257,700 cannot be divided by just 1 and 21,257,700, 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).