31130030032 has 20 divisors (see below), whose sum is σ = 60322334436. Its totient is φ = 15562976000.

The previous prime is 31130030011. The next prime is 31130030047. The reversal of 31130030032 is 23003003113.

It can be written as a sum of positive squares in 2 ways, for example, as 2265379216 + 28864650816 = 47596^2 + 169896^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 31130029988 and 31130030015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2532 + ... + 249532.

Almost surely, 2^31130030032 is an apocalyptic number.

It is an amenable number.

31130030032 is a deficient number, since it is larger than the sum of its proper divisors (29192304404).

31130030032 is a wasteful number, since it uses less digits than its factorization.

31130030032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254886 (or 254880 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 16.

Adding to 31130030032 its reverse (23003003113), we get a palindrome (54133033145).

The spelling of 31130030032 in words is "thirty-one billion, one hundred thirty million, thirty thousand, thirty-two".