31112332131 has 64 divisors (see below), whose sum is σ = 44568576000. Its totient is φ = 19273887360.

The previous prime is 31112332123. The next prime is 31112332133. The reversal of 31112332131 is 13123321113.

It is a happy number.

It is not a de Polignac number, because 31112332131 - 2³ = 31112332123 is a prime.

It is a super-2 number, since 2×31112332131² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31112332098 and 31112332107.

It is not an unprimeable number, because it can be changed into a prime (31112332133) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 50261940 + ... + 50262558.

It is an arithmetic number, because the mean of its divisors is an integer number (696384000).

Almost surely, 2^31112332131 is an apocalyptic number.

31112332131 is a deficient number, since it is larger than the sum of its proper divisors (13456243869).

31112332131 is a wasteful number, since it uses less digits than its factorization.

31112332131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 904.

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

Adding to 31112332131 its reverse (13123321113), we get a palindrome (44235653244).

The spelling of 31112332131 in words is "thirty-one billion, one hundred twelve million, three hundred thirty-two thousand, one hundred thirty-one".