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219 (number)

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Natural number
← 218 219 220 →
210 211 212 213 214 215 216 217 218 219 0 100 200 300 400 500 600 700 800 900
Cardinaltwo hundred nineteen
Ordinal219th
(two hundred nineteenth)
Factorization3 × 73
Greek numeralΣΙΘ´
Roman numeralCCXIX, ccxix
Binary110110112
Ternary220103
Senary10036
Octal3338
Duodecimal16312
HexadecimalDB16

219 (two hundred nineteen) is the natural number following 218 and preceding 220.

In mathematics

  • 219 is a happy number.
  • Mertens function (219) = 4, a record high.
  • There are 219 partially ordered sets on four labeled elements.
  • 219 is the smallest number that can be represented as a sum of four positive cubes in two different ways.
  • There are 219 different space groups, discrete and full-dimensional sets of symmetries of three-dimensional space or of crystal structures.

References

  1. Sloane, N. J. A. (ed.). "Sequence A007770 (Happy numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. 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.
  3. Sloane, N. J. A. (ed.). "Sequence A001035 (Number of partially ordered sets ("posets") with n labeled elements (or labeled acyclic transitive digraphs))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. Sloane, N. J. A. (ed.). "Sequence A025420 (Least sum of 4 positive cubes in exactly n ways)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation..
Integers
−1
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