233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234.
Additionally:
- 233 is a prime number[1]
- 233 is a Sophie Germain prime,[2] a Pillai prime,[3] and a Ramanujan prime[4]
- It is a Fibonacci number,[5] one of the Fibonacci primes[6]
- There are exactly 233 maximal planar graphs with ten vertices,[7] and 233 connected topological spaces with four points[8]
References
- ^ Sloane, N. J. A. (ed.). "Sequence A000040 (The prime numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
- ^ 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 A000045 (Fibonacci numbers)". 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.