31130312032 has 24 divisors (see below), whose sum is σ = 61292409696. Its totient is φ = 15563985792.

The previous prime is 31130311997. The next prime is 31130312039. The reversal of 31130312032 is 23021303113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31130312039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531433 + ... + 587095.

It is an arithmetic number, because the mean of its divisors is an integer number (2553850404).

Almost surely, 2^31130312032 is an apocalyptic number.

31130312032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31130312032 is a deficient number, since it is larger than the sum of its proper divisors (30162097664).

31130312032 is a wasteful number, since it uses less digits than its factorization.

31130312032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73150 (or 73142 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 31130312032 its reverse (23021303113), we get a palindrome (54151615145).

The spelling of 31130312032 in words is "thirty-one billion, one hundred thirty million, three hundred twelve thousand, thirty-two".