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It is a composite number, you can get 81 by mulitpling 1*81, 3*27, and 9*9.
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No the number 81 is not prime it can be divided by nine.
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Factoring and Multiples

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What is the prime factorization of 24

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What is the prime factorization of 34

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Q: Is 81 a prime or composite number?
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Related questions

What is 81 is that a prime?

81 is not prime it's a composite number


Is 81 prime or comsite?

It is a composite number.


Is 81a prime?

81 is a Composite Number


What is the prime number of 81 is it even or odd?

81 is an odd composite number.


Is 81 prime or a composite?

81 is a composite number because it has more than two factors.


Is 81a composite number or a prime number?

81 is a composite number and it is also a square number


Why is 81 prime?

81 is not prime, it is composite.


Is 81 prime or composite numder?

81 is a composite number because its factors are more than 2


What is the greatest common factor of 29 and 81?

The greatest common factor of a prime number & a composite number is 1 if the composite number is not divisible by the prime number. 81(composite number) is not divisible by 29(prime number) so, gcf(29,81) = 1.


What is the composite number as a product of prime number for 81?

81 = 3*3*3*3


Is 81 is a prime or composite?

It is composite.


81 prime or composite?

81 is a composite number. Composite numbers are any number that has more than two factors(one and itself). Therefore, since 3,9, and 27 are factors of 81 that makes it a composite number.


Is 81 a prime number or a composite number?

81 is a composite number because it has factors other than 1 and itself. 81 is not a prime number. 81 = 3 * 3 * 3 * 3. Its positive integer factors are: 1, 3, 9, 27, 81.


Is 81 a composite or prime number?

81 is a composite number because it has more factors than 1 and itself. The factors of 81 are 1, 3, 9, 27, and 81.


Is 81 a prime number?

81 is not a prime number. Its positive integer factors are: 1, 3, 9, 27, 81.81 is a Composite Number.


Is 81 a prime a number a composite?

Composite because it has more than two factors.


Is 81 a prime composite or neither number?

81 is a composite number as it has factors other than 1 and itself (3, 27 and 9).


Is 81 a prime or composite or neither?

It is composite.


Is 81 prime composite or neather?

It is composite.


What is a composite number that is greater than 80?

How about 81 or any number that is not a prime number.


Is 81 neither prime or composite?

Composite


Is eighty one a composite or prime number?

81 is not a prime number, it is the product of 9 X 9.


Is 41 51 71 81 91 a prime number?

41 is prime. 51 is composite. 51=3 x 17 . 71 is prime. 81 is composite. 92 91 is composite. 91 = 7 × 13


IS 81 a prime composite or neither?

81 = 92 = 34 So 81 is not prime


Is eighty-one a composite or prime number?

81 is a composite 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.