31130240444 has 12 divisors (see below), whose sum is σ = 54607324968. Its totient is φ = 15528147600.

The previous prime is 31130240419. The next prime is 31130240467. The reversal of 31130240444 is 44404203113.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9241262 + ... + 9244629.

It is an arithmetic number, because the mean of its divisors is an integer number (4550610414).

Almost surely, 2^31130240444 is an apocalyptic number.

It is an amenable number.

31130240444 is a deficient number, since it is larger than the sum of its proper divisors (23477084524).

31130240444 is a wasteful number, since it uses less digits than its factorization.

31130240444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18486316 (or 18486314 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 31130240444 its reverse (44404203113), we get a palindrome (75534443557).

The spelling of 31130240444 in words is "thirty-one billion, one hundred thirty million, two hundred forty thousand, four hundred forty-four".