233 (number)

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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.