31108286540 has 24 divisors (see below), whose sum is σ = 65330904240. Its totient is φ = 12442647488.

The previous prime is 31108286533. The next prime is 31108286549. The reversal of 31108286540 is 4568280113.

It is a junction number, because it is equal to n+sod(n) for n = 31108286494 and 31108286503.

It is not an unprimeable number, because it can be changed into a prime (31108286549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535646 + ... + 590874.

It is an arithmetic number, because the mean of its divisors is an integer number (2722121010).

Almost surely, 2^31108286540 is an apocalyptic number.

It is an amenable number.

31108286540 is an abundant number, since it is smaller than the sum of its proper divisors (34222617700).

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

31108286540 is a wasteful number, since it uses less digits than its factorization.

31108286540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83401 (or 83399 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 31108286540 in words is "thirty-one billion, one hundred eight million, two hundred eighty-six thousand, five hundred forty".