233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234. In mathematics 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. In other fields +233 is the telephone country code for Ghana. 233 Celsius is the temperature at which paper burns. References Integers