233

233 is a natural number that follows 232 and precedes 234. It is an odd, positive integer with several notable mathematical properties.

In mathematics, 233 is prime, meaning it has no positive divisors other than 1 and itself. It is also a Fibonacci number, specifically F(13) = 233, which places it among the Fibonacci primes. Additionally, 233 can be expressed as the sum of two squares: 233 = 8^2 + 13^2. In different numeral systems, it is written as 11101001 in binary, E9 in hexadecimal, and CCXXXIII in Roman numerals.

Beyond pure mathematics, 233 appears in various practical coding and calendrical contexts. The international calling code for Ghana is +233. In calendar terms, 233 is the 233rd day of a common year, which falls on August 21; in a leap year the corresponding day would be August 20. As a year, AD 233 sits in the third century of the Common Era and is a point of reference in historical timelines.

Overall, 233 is a small integer with a set of interconnected mathematical properties and several real-world references that give it relevance in number theory, coding, and calendrical systems.