50 (number)

This article is about the number. For the year 50 AD, see 50. For other uses of 50, see 50 (disambiguation).
49 50 51
Cardinal fifty
Ordinal 50th
(fiftieth)
Numeral system quinquagesimal
Factorization 2 × 52
Divisors 1, 2, 5, 10, 25, 50
Roman numeral L
Unicode symbol(s)
Binary 1100102
Ternary 12123
Quaternary 3024
Quinary 2005
Senary 1226
Octal 628
Duodecimal 4212
Hexadecimal 3216
Vigesimal 2A20
Base 36 1E36

100

50 (fifty) is the natural number following 49 and preceding 51.

In mathematics

Fifty is the smallest number that is the sum of two non-zero square numbers in two distinct ways: 50 = 12 + 72 = 52 + 52.[1] It is also the sum of three squares, 50 = 32 + 42 + 52, and the sum of four squares, 50 = 62 + 32 + 22 + 12. It is a Harshad number.[2]

There is no solution to the equation φ(x) = 50, making 50 a nontotient.[3] Nor is there a solution to the equation x φ(x) = 50, making 50 a Nonients.[4]

The aliquot sum of 50 is 42 and its aliquot sequence is (50,43,1,0). Fifty is itself the aliquot sum of 40 and 94.

Look up fifty in Wiktionary, the free dictionary.

In science

In religion

In sports

In other fields

Fifty is:

References

  1. de Koninck, J.M. (2009). Those fascinating numbers. AMS Bookstore. p. 18. ISBN 0-8218-4807-0.
  2. "Sloane's A005349 : Niven (or Harshad) numbers". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  3. "Sloane's A005277 : Nonients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  4. "Sloane's A005278 : Noncotients". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2016-05-30.
  5. Adkison, Linda (2011). Elsevier's Integrated Review Genetics. p. 42.
  6. Leviticus 25:10
  7. Karen Rhodes (1 February 1997). Booking Hawaii Five-O: An Episode Guide and Critical History of the 1968–1980 Television Detective Series. McFarland. p. 265. ISBN 978-0-7864-8666-3.
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