The number "431" is an integer that follows 430 and precedes 432. It is an odd number and can be classified as a composite number because it has divisors other than 1 and itself. The prime factorization of 431 is 431, indicating that it is a prime number. In mathematics, "431" can also be used in various contexts, such as in coding systems or as a reference number. For example, it may appear in area codes, zip codes, or as a part of a mathematical sequence. Its significance can vary depending on the context in which it is used.