218 (number)

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← 217 218 219 →
List of numbers — Integers
← 0 100 200 300 400 500 600 700 800 900 →
Cardinaltwo hundred eighteen
Ordinal218th
(two hundred eighteenth)
Factorization2 × 109
Greek numeralΣΙΗ´
Roman numeralCCXVIII
Binary110110102
Ternary220023
Octal3328
Duodecimal16212
HexadecimalDA16

218 (two hundred [and] eighteen) is the natural number following 217 and preceding 219.

In mathematics[]

  • Mertens function(218) = 3, a record high.[1]
  • 218 is nontotient and also noncototient.[2]
  • 218 is the number of inequivalent ways to color the 12 edges of a cube using at most 2 colors, where two colorings are equivalent if they differ only by a rotation of the cube.
  • As of 2008, 218 votes are required in the US House of Representatives to achieve a majority.[3]
  • The years 218 and 218 BC

Area code 218, for northern Minnesota.

References[]

  1. ^ Sloane, N. J. A. (ed.). "Sequence A051400 (Smallest value of x such that M(x)=n, where M() is Mertens's function)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ Sloane, N. J. A. (ed.). "Sequence A058763 (Integers which are neither totient nor cototient)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  3. ^ "Why did bail-out pass this time?". 4 October 2008.
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