231112431 has 24 divisors (see below), whose sum is σ = 366038400. Its totient is φ = 139352400.

The previous prime is 231112429. The next prime is 231112477. The reversal of 231112431 is 134211132.

231112431 is a `hidden beast` number, since 231 + 1 + 1 + 2 + 431 = 666.

It is not a de Polignac number, because 231112431 - 2¹ = 231112429 is a prime.

It is a super-2 number, since 2×231112431² = 106825911525459522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231112411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13836 + ... + 25566.

It is an arithmetic number, because the mean of its divisors is an integer number (15251600).

Almost surely, 2^231112431 is an apocalyptic number.

231112431 is a deficient number, since it is larger than the sum of its proper divisors (134925969).

231112431 is a wasteful number, since it uses less digits than its factorization.

231112431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11947 (or 11944 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 231112431 is about 15202.3824119774. The cubic root of 231112431 is about 613.6787737482.

Adding to 231112431 its reverse (134211132), we get a palindrome (365323563).

The spelling of 231112431 in words is "two hundred thirty-one million, one hundred twelve thousand, four hundred thirty-one".