115 (one hundred [and] fifteen) is the natural number following 114 and preceding 116.
| ||||
|---|---|---|---|---|
| Cardinal | one hundred fifteen | |||
| Ordinal | 115th (one hundred fifteenth) | |||
| Factorization | 5 × 23 | |||
| Divisors | 1, 5, 23, 115 | |||
| Greek numeral | ΡΙΕ´ | |||
| Roman numeral | CXV | |||
| Binary | 11100112 | |||
| Ternary | 110213 | |||
| Senary | 3116 | |||
| Octal | 1638 | |||
| Duodecimal | 9712 | |||
| Hexadecimal | 7316 | |||
In mathematics
edit115 has a square sum of divisors:[1]
There are 115 different rooted trees with exactly eight nodes,[2] 115 inequivalent ways of placing six rooks on a 6 × 6 chess board in such a way that no two of the rooks attack each other,[3] and 115 solutions to the stamp folding problem for a strip of seven stamps.[4]
115 is also a heptagonal pyramidal number.[5] The 115th Woodall number,
is a prime number.[6] 115 is the sum of the first five heptagonal numbers.
In science
edit115 is the atomic number of moscovium.
In sport
edit115 is the number of alleged Premier League FFP breaches by Manchester City.
See also
editReferences
edit- ^ Sloane, N. J. A. (ed.). "Sequence A006532 (Numbers n such that sum of divisors of n is a square)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A000081 (Number of rooted trees with n nodes (or connected functions with a fixed point))". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A000903 (Number of inequivalent ways of placing n nonattacking rooks on n X n board)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A002369 (Number of ways of folding a strip of n rectangular stamps)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A002413 (Heptagonal (or 7-gonal) pyramidal numbers: n*(n+1)*(5*n-2)/6)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ Sloane, N. J. A. (ed.). "Sequence A002234 (Numbers n such that the Woodall number n*2^n - 1 is prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.