Q: Is 21,000,150 a Composite Number?

Why is 21,000,150 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 21,000,150 can be evenly divided by 1 2 3 5 6 9 10 15 18 23 25 30 45 46 50 69 75 90 115 138 150 207 225 230 345 414 450 575 690 1,035 1,150 1,725 2,029 2,070 3,450 4,058 5,175 6,087 10,145 10,350 12,174 18,261 20,290 30,435 36,522 46,667 50,725 60,870 91,305 93,334 101,450 140,001 152,175 182,610 233,335 280,002 304,350 420,003 456,525 466,670 700,005 840,006 913,050 1,166,675 1,400,010 2,100,015 2,333,350 3,500,025 4,200,030 7,000,050 10,500,075 and 21,000,150, with no remainder.

Since 21,000,150 cannot be divided by just 1 and 21,000,150, 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).