231032111031 has 32 divisors (see below), whose sum is σ = 345453926400. Its totient is φ = 152592448320.

The previous prime is 231032111027. The next prime is 231032111147. The reversal of 231032111031 is 130111230132.

231032111031 is a `hidden beast` number, since 2 + 310 + 321 + 1 + 1 + 0 + 31 = 666.

It is not a de Polignac number, because 231032111031 - 2² = 231032111027 is a prime.

It is a super-2 number, since 2×231032111031² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231032110995 and 231032111013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231032116031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2093155 + ... + 2200763.

It is an arithmetic number, because the mean of its divisors is an integer number (10795435200).

Almost surely, 2^231032111031 is an apocalyptic number.

231032111031 is a deficient number, since it is larger than the sum of its proper divisors (114421815369).

231032111031 is a wasteful number, since it uses less digits than its factorization.

231032111031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108356 (or 108350 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 231032111031 its reverse (130111230132), we get a palindrome (361143341163).

The spelling of 231032111031 in words is "two hundred thirty-one billion, thirty-two million, one hundred eleven thousand, thirty-one".