Q: Is 21,015,000 a Composite Number?

Why is 21,015,000 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 21,015,000 can be evenly divided by 1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 30 36 40 45 50 60 72 75 90 100 120 125 150 180 200 225 250 300 360 375 450 467 500 600 625 750 900 934 1,000 1,125 1,250 1,401 1,500 1,800 1,868 1,875 2,250 2,335 2,500 2,802 3,000 3,736 3,750 4,203 4,500 4,670 5,000 5,604 5,625 7,005 7,500 8,406 9,000 9,340 11,208 11,250 11,675 14,010 15,000 16,812 18,680 21,015 22,500 23,350 28,020 33,624 35,025 42,030 45,000 46,700 56,040 58,375 70,050 84,060 93,400 105,075 116,750 140,100 168,120 175,125 210,150 233,500 280,200 291,875 350,250 420,300 467,000 525,375 583,750 700,500 840,600 875,625 1,050,750 1,167,500 1,401,000 1,751,250 2,101,500 2,335,000 2,626,875 3,502,500 4,203,000 5,253,750 7,005,000 10,507,500 and 21,015,000, with no remainder.

Since 21,015,000 cannot be divided by just 1 and 21,015,000, 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).