218 (number)
| ||||
|---|---|---|---|---|
| Cardinal | two hundred eighteen | |||
| Ordinal | 218th (two hundred eighteenth) | |||
| Factorization | 2 × 109 | |||
| Greek numeral | ΣΙΗ´ | |||
| Roman numeral | CCXVIII, ccxviii | |||
| Binary | 110110102 | |||
| Ternary | 220023 | |||
| Senary | 10026 | |||
| Octal | 3328 | |||
| Duodecimal | 16212 | |||
| Hexadecimal | DA16 | |||
218 (two hundred [and] eighteen) is the natural number following 217 and preceding 219.
In mathematics
[edit]- 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.
- There are 218 nondegenerate Boolean functions of 3 variables.[3]
- The number of surface points on a 73 cube.[4]
See also
[edit]References
[edit]- ^ 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.
- ^ Sloane, N. J. A. (ed.). "Sequence A058763 (Integers which are neither totient nor cototient)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A000371". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation. Retrieved 2022-05-10.
- ^ Sloane, N. J. A. (ed.). "Sequence A005897". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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