23131031031 has 32 divisors (see below), whose sum is σ = 34578720000. Its totient is φ = 15281439264.

The previous prime is 23131031029. The next prime is 23131031087. The reversal of 23131031031 is 13013013132.

It is a happy number.

23131031031 is a `hidden beast` number, since 2 + 313 + 10 + 310 + 31 = 666.

It is not a de Polignac number, because 23131031031 - 2¹ = 23131031029 is a prime.

It is a super-2 number, since 2×23131031031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 23131030995 and 23131031013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131031731) 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, 1775700 + ... + 1788678.

It is an arithmetic number, because the mean of its divisors is an integer number (1080585000).

Almost surely, 2^23131031031 is an apocalyptic number.

23131031031 is a deficient number, since it is larger than the sum of its proper divisors (11447688969).

23131031031 is a wasteful number, since it uses less digits than its factorization.

23131031031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13580 (or 13574 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 23131031031 its reverse (13013013132), we get a palindrome (36144044163).

The spelling of 23131031031 in words is "twenty-three billion, one hundred thirty-one million, thirty-one thousand, thirty-one".