To determine if 221 is a prime number or a composite number, we simply look at the factors for 221.
If the factors of 221 are only 221 and 1, then we know that 221 is a prime number. Otherwise, 221 is a composite number.
To explain better, if 221 is only divisible by 1 and 221, then it is a prime number, and if 221 is divisible by more than 221 and 1, then it is a composite number.
The factors of 221 are as follows:
1, 13, 17, 221
Therefore, since 221 is divisible by more than one and itself, the answer to the
question "Is 221 prime or composite?" is highlighted in blue below.
composite
Is 222 prime or composite?
OK. Now you know that 221 is a composite number. Use our logic above and see if
you can figure out if the next number on our list is prime or composite before you check your answer.
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