The Natural Number 15

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Properties of the Number 15

  • Because 15 is not divisible by 2 ...
    • 15 is an odd number
    • 15 has parity 1
    • 15 is not an even number
  • Because 15 can be factored as 3 x 5 ...
    • 15 is a composite number
    • 15 is not a prime number

Alternative Representations of the Number 15

  • Base 2 (binary): 1111
  • Base 8 (octal): 17
  • Base 16 (hexadecimal): F
  • Roman numeral: XV
  • Words: fifteen

Divisors of the Number 15

  • 15 has 4 positive divisors: 1, 3, 5, 15
    • The sum of the positive divisors is 24
  • 15 has 3 proper divisors: 1, 3, 5
    • The sum of the proper divisors is 9
  • 15 is a deficient number since the sum of the proper divisors is less than 15
  • 15 is not a perfect number
  • 15 is not an abundant number

More Properties of the Number 15

  • 15 is not a square number
  • 15 is not a cube number
  • 15 is not a palindromic number
  • 15 is not a Fibonacci number
  • 15 is not a Lucas number

5:03 pm, Monday, April 24, 2017 (UTC; +0000)
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