Q: Is 21,555,200 a Composite Number?

Why is 21,555,200 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 21,555,200 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 128 160 200 256 320 400 421 512 640 800 842 1,024 1,280 1,600 1,684 2,048 2,105 2,560 3,200 3,368 4,210 5,120 6,400 6,736 8,420 10,240 10,525 12,800 13,472 16,840 21,050 25,600 26,944 33,680 42,100 51,200 53,888 67,360 84,200 107,776 134,720 168,400 215,552 269,440 336,800 431,104 538,880 673,600 862,208 1,077,760 1,347,200 2,155,520 2,694,400 4,311,040 5,388,800 10,777,600 and 21,555,200, with no remainder.

Since 21,555,200 cannot be divided by just 1 and 21,555,200, 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).