The Natural Number 2

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Properties of the Number 2

  • Because 2 is divisible by 2 ...
    • 2 is an even number
    • 2 has parity 0
    • 2 is not an odd number
  • Because 2 has only 1 and itself as divisors ...
    • 2 is a prime number
    • 2 is not a composite number

Alternative Representations of the Number 2

  • Base 2 (binary): 10
  • Base 8 (octal): 2
  • Base 16 (hexadecimal): 2
  • Roman numeral: II
  • Words: two

Divisors of the Number 2

  • 2 has 2 positive divisors: 1, 2
    • The sum of the positive divisors is 3
  • 2 has 1 proper divisor: 1
    • The sum of the proper divisors is 1
  • 2 is a deficient number since the sum of the proper divisors is less than 2
  • 2 is not a perfect number
  • 2 is not an abundant number

More Properties of the Number 2

  • 2 is not a square number
  • 2 is not a cube number
  • 2 is a palindromic number (i.e., the digits are the same forwards and backwards)
  • 2 is a Fibonacci number
  • 2 is a Lucas number

5:31 pm, Monday, May 22, 2017 (UTC; +0000)
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