31130522031 has 16 divisors (see below), whose sum is σ = 47441235968. Its totient is φ = 17787276000.

The previous prime is 31130522029. The next prime is 31130522099. The reversal of 31130522031 is 13022503113.

It is not a de Polignac number, because 31130522031 - 2¹ = 31130522029 is a prime.

It is a super-2 number, since 2×31130522031² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 31130521989 and 31130522007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130522231) 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, 198066 + ... + 318576.

It is an arithmetic number, because the mean of its divisors is an integer number (2965077248).

Almost surely, 2^31130522031 is an apocalyptic number.

31130522031 is a deficient number, since it is larger than the sum of its proper divisors (16310713937).

31130522031 is a wasteful number, since it uses less digits than its factorization.

31130522031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132822.

The product of its (nonzero) digits is 540, while the sum is 21.

It can be divided in two parts, 311305 and 22031, that added together give a triangular number (333336 = T₈₁₆).

The spelling of 31130522031 in words is "thirty-one billion, one hundred thirty million, five hundred twenty-two thousand, thirty-one".