233 (number)
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|---|---|---|---|---|
| Cardinal | two hundred thirty-three | |||
| Ordinal | 233rd (two hundred thirty-third) | |||
| Factorization | prime | |||
| Prime | yes | |||
| Greek numeral | ΣΛΓ´ | |||
| Roman numeral | CCXXXIII, ccxxxiii | |||
| Binary | 111010012 | |||
| Ternary | 221223 | |||
| Senary | 10256 | |||
| Octal | 3518 | |||
| Duodecimal | 17512 | |||
| Hexadecimal | E916 | |||
233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234.
In mathematics
[edit]233 is a Sophie Germain prime,[1] a Pillai prime,[2] and a Ramanujan prime.[3] It is a Fibonacci prime, a fibonacci number that is also a prime number.[4]
There are exactly 233 maximal planar graphs with ten vertices.[5]
There are 233 connected topological spaces with four points.[6]
It is the hypotenuse of a primitive Pythagorean triple: 2332 = 1052 + 2082.
References
[edit]- ↑ Sloane, N. J. A. (ed.). "Sequence A005384 (Sophie Germain primes p: 2p+1 is also prime)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ Sloane, N. J. A. (ed.). "Sequence A063980 (Pillai primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ Sloane, N. J. A. (ed.). "Sequence A104272 (Ramanujan primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ Sloane, N. J. A. (ed.). "Sequence A005478 (Prime Fibonacci numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ Sloane, N. J. A. (ed.). "Sequence A000109 (Number of simplicial polyhedra with n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ↑ Sloane, N. J. A. (ed.). "Sequence A001929 (Number of connected topologies on n labeled points)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
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