231331112031 has 16 divisors (see below), whose sum is σ = 310779406944. Its totient is φ = 153052406784.

The previous prime is 231331112017. The next prime is 231331112059. The reversal of 231331112031 is 130211133132.

It is a happy number.

It is not a de Polignac number, because 231331112031 - 2⁶ = 231331111967 is a prime.

It is a super-2 number, since 2×231331112031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231331111989 and 231331112007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231331112431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434711 + ... + 1587783.

It is an arithmetic number, because the mean of its divisors is an integer number (19423712934).

Almost surely, 2^231331112031 is an apocalyptic number.

231331112031 is a deficient number, since it is larger than the sum of its proper divisors (79448294913).

231331112031 is a wasteful number, since it uses less digits than its factorization.

231331112031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156890.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 231331112031 its reverse (130211133132), we get a palindrome (361542245163).

The spelling of 231331112031 in words is "two hundred thirty-one billion, three hundred thirty-one million, one hundred twelve thousand, thirty-one".