Q: Is 21,131,200 a Composite Number?

Why is 21,131,200 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 21,131,200 can be evenly divided by 1 2 4 5 8 10 16 20 25 32 40 47 50 64 80 94 100 160 188 200 235 281 320 376 400 470 562 752 800 940 1,124 1,175 1,405 1,504 1,600 1,880 2,248 2,350 2,810 3,008 3,760 4,496 4,700 5,620 7,025 7,520 8,992 9,400 11,240 13,207 14,050 15,040 17,984 18,800 22,480 26,414 28,100 37,600 44,960 52,828 56,200 66,035 75,200 89,920 105,656 112,400 132,070 211,312 224,800 264,140 330,175 422,624 449,600 528,280 660,350 845,248 1,056,560 1,320,700 2,113,120 2,641,400 4,226,240 5,282,800 10,565,600 and 21,131,200, with no remainder.

Since 21,131,200 cannot be divided by just 1 and 21,131,200, 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).