Q: Is 21,115,000 a Composite Number?

Why is 21,115,000 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 21,115,000 can be evenly divided by 1 2 4 5 8 10 20 25 40 41 50 82 100 103 125 164 200 205 206 250 328 410 412 500 515 625 820 824 1,000 1,025 1,030 1,250 1,640 2,050 2,060 2,500 2,575 4,100 4,120 4,223 5,000 5,125 5,150 8,200 8,446 10,250 10,300 12,875 16,892 20,500 20,600 21,115 25,625 25,750 33,784 41,000 42,230 51,250 51,500 64,375 84,460 102,500 103,000 105,575 128,750 168,920 205,000 211,150 257,500 422,300 515,000 527,875 844,600 1,055,750 2,111,500 2,639,375 4,223,000 5,278,750 10,557,500 and 21,115,000, with no remainder.

Since 21,115,000 cannot be divided by just 1 and 21,115,000, 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).