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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.
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Continue Learning about Basic Math
Is 81 prime or a composite?
81 is a composite number because it has more than two factors.
Is 81 prime or composite numder?
81 is a composite number because its factors are more than 2
What is the composite number as a product of prime number for 81?
81 = 3*3*3*3
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 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.
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