31112312031 has 8 divisors (see below), whose sum is σ = 46092314160. Its totient is φ = 20741541336.

The previous prime is 31112312029. The next prime is 31112312041. The reversal of 31112312031 is 13021321113.

31112312031 is a `hidden beast` number, since 311 + 12 + 312 + 0 + 31 = 666.

It is not a de Polignac number, because 31112312031 - 2¹ = 31112312029 is a prime.

It is a super-2 number, since 2×31112312031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31112311995 and 31112312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112312041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 576153900 + ... + 576153953.

It is an arithmetic number, because the mean of its divisors is an integer number (5761539270).

Almost surely, 2^31112312031 is an apocalyptic number.

31112312031 is a deficient number, since it is larger than the sum of its proper divisors (14980002129).

31112312031 is a wasteful number, since it uses less digits than its factorization.

31112312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152307862 (or 1152307856 counting only the distinct ones).

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

Adding to 31112312031 its reverse (13021321113), we get a palindrome (44133633144).

The spelling of 31112312031 in words is "thirty-one billion, one hundred twelve million, three hundred twelve thousand, thirty-one".