The Natural Number 221

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Properties of the Number 221

  • Because 221 is not divisible by 2 ...
    • 221 is an odd number
    • 221 has parity 1
    • 221 is not an even number
  • Because 221 can be factored as 13 x 17 ...
    • 221 is a composite number
    • 221 is not a prime number

Alternative Representations of the Number 221

  • Base 2 (binary): 11011101
  • Base 8 (octal): 335
  • Base 16 (hexadecimal): DD
  • Roman numeral: CCXXI
  • Words: two hundred twenty-one

Divisors of the Number 221

  • 221 has 4 positive divisors: 1, 13, 17, 221
    • The sum of the positive divisors is 252
  • 221 has 3 proper divisors: 1, 13, 17
    • The sum of the proper divisors is 31
  • 221 is a deficient number since the sum of the proper divisors is less than 221
  • 221 is not a perfect number
  • 221 is not an abundant number

More Properties of the Number 221

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

11:59 pm, Thursday, March 23, 2017 (UTC; +0000)
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