233 (number)

• 233 is a prime number
• 233 is a Sophie Germain prime, a Pillai prime, and a Ramanujan prime
• It is a Fibonacci number, one of the Fibonacci primes
• There are exactly 233 maximal planar graphs with ten vertices, and 233 connected topological spaces with four points
• It is the hypotenuse of a primitive Pythagorean triple:.