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Number Analysis: 81

The number 81 is composite.

Factors of 81

1 3 9 27 81

Number Properties

  • Value: 81
  • Type: Composite number
  • Number of factors: 5
  • Even/Odd: Odd
  • Perfect square: Yes

Mathematical Analysis

81 is a composite number because it has factors other than 1 and itself.

It can be written as the product of prime numbers:

3333
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