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Lets see if 217 is a prime or composite number. 15 times 15 is 225, so we will try the first prime numbers up to 15. They are 2, 3, 5, 7, 11, and 13. Will 2 go into 217? No 7 is odd. Will 3 go into 217. If we add the integers, they add up to 10. 3 does not go into 10. Will 5 go into 217. No. It does not end in a 0 or a 5. Will 7 go into 217. Lets see. Will 7 go into 21? Yes it goes in an even number of times. How about that. Will seven go into 7. Yes it goes in an even number of times. You can show the math.

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Q: Is 217 a prime or composite number?

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217 is not prime. 217 = 7 * 31

217 is a prime number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.

It's not prime number because it has more than two factors therefore it's a composite number

Yes.

217 isn't prime. It's factors are 1,7,31 and 217.

It is a composite number.

It is not a prime number, it is a composite number.

It is not a prime number, it is a composite number.

It is a composite number, not a prime number.

217 is not a prime number. 7 and 31 are factors of 217 besides one and itself.

It is a prime number, and therefore not a composite number.251 is prime.

It is a prime number, and therefore not a composite number.211 is a prime number.

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