Q: Is 561,561 a Composite Number?

 A: Yes, 561,561 is a composite number.

Why is 561,561 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 561,561 can be evenly divided by 1 3 7 11 13 17 21 33 39 51 77 91 119 121 143 187 221 231 273 357 363 429 561 663 847 1,001 1,309 1,547 1,573 2,057 2,431 2,541 3,003 3,927 4,641 4,719 6,171 7,293 11,011 14,399 17,017 26,741 33,033 43,197 51,051 80,223 187,187 and 561,561, with no remainder.

Since 561,561 cannot be divided by just 1 and 561,561, it is a composite number.


More Examples

Number 561,559561,560561,562561,563
Composite? noyesyesyes
  • All positive natural numbers are either a prime number or a composite number (except the number 1, which is neither).

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