Q: Is 7,813,905 a Composite Number?

Why is 7,813,905 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 7,813,905 can be evenly divided by 1 3 5 11 15 23 29 33 55 69 71 87 115 145 165 213 253 319 345 355 435 667 759 781 957 1,065 1,265 1,595 1,633 2,001 2,059 2,343 3,335 3,795 3,905 4,785 4,899 6,177 7,337 8,165 10,005 10,295 11,715 17,963 22,011 22,649 24,495 30,885 36,685 47,357 53,889 67,947 89,815 110,055 113,245 142,071 236,785 269,445 339,735 520,927 710,355 1,562,781 2,604,635 and 7,813,905, with no remainder.

Since 7,813,905 cannot be divided by just 1 and 7,813,905, 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).