233 (number)

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← 232 233 234 →
Cardinaltwo hundred thirty-three
Ordinal233rd
(two hundred thirty-third)
Factorizationprime
Primeyes
Greek numeralΣΛΓ´
Roman numeralCCXXXIII
Binary111010012
Ternary221223
Quaternary32214
Quinary14135
Senary10256
Octal3518
Duodecimal17512
HexadecimalE916
VigesimalBD20
Base 366H36

233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234.

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[edit]

  1. ^ Sloane, N. J. A. (ed.). "Sequence A000040 (The prime numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  2. ^ 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.
  3. ^ Sloane, N. J. A. (ed.). "Sequence A063980 (Pillai primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  4. ^ Sloane, N. J. A. (ed.). "Sequence A104272 (Ramanujan primes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  5. ^ Sloane, N. J. A. (ed.). "Sequence A000045 (Fibonacci numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  6. ^ Sloane, N. J. A. (ed.). "Sequence A005478 (Prime Fibonacci numbers)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  7. ^ Sloane, N. J. A. (ed.). "Sequence A000109 (Number of simplicial polyhedra with n nodes)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.
  8. ^ Sloane, N. J. A. (ed.). "Sequence A001929 (Number of connected topologies on n labeled points)". The On-Line Encyclopedia of Integer Sequences. OEIS Foundation.