233

233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234. Additionally: 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: 2332 = 1052 + 2082.