233 (two hundred [and] thirty-three) is the natural number following 232 and preceding 234.
In mathematics 233 is a Sophie Germain prime, a Pillai prime, and a Ramanujan prime. It is a Fibonacci prime, a fibonacci number that is also a prime number. There are exactly 233 maximal planar graphs with ten vertices. There are 233 connected topological spaces with four points. It is the hypotenuse of a primitive Pythagorean triple: 2332 = 1052 + 2082.
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