31540320112 has 40 divisors (see below), whose sum is σ = 73515036800. Its totient is φ = 12805843392.

The previous prime is 31540320109. The next prime is 31540320137. The reversal of 31540320112 is 21102304513.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7408662 + ... + 7412917.

It is an arithmetic number, because the mean of its divisors is an integer number (1837875920).

Almost surely, 2^31540320112 is an apocalyptic number.

It is an amenable number.

31540320112 is an abundant number, since it is smaller than the sum of its proper divisors (41974716688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31540320112 is a wasteful number, since it uses less digits than its factorization.

31540320112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14821613 (or 14821607 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 31540320112 its reverse (21102304513), we get a palindrome (52642624625).

The spelling of 31540320112 in words is "thirty-one billion, five hundred forty million, three hundred twenty thousand, one hundred twelve".