Q: Is 21,120,225 a Composite Number?

 A: Yes, 21,120,225 is a composite number.

Why is 21,120,225 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 21,120,225 can be evenly divided by 1 3 5 7 15 21 25 35 49 75 105 147 175 245 343 525 735 821 1,029 1,225 1,715 2,463 3,675 4,105 5,145 5,747 8,575 12,315 17,241 20,525 25,725 28,735 40,229 61,575 86,205 120,687 143,675 201,145 281,603 431,025 603,435 844,809 1,005,725 1,408,015 3,017,175 4,224,045 7,040,075 and 21,120,225, with no remainder.

Since 21,120,225 cannot be divided by just 1 and 21,120,225, it is a composite number.


More Examples

Number 21,120,22321,120,22421,120,22621,120,227
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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