31083855912 has 96 divisors (see below), whose sum is σ = 85208760000. Its totient is φ = 10235554560.

The previous prime is 31083855911. The next prime is 31083855937. The reversal of 31083855912 is 21955838013.

31083855912 is a `hidden beast` number, since 3 + 1 + 0 + 83 + 8 + 559 + 12 = 666.

It is not an unprimeable number, because it can be changed into a prime (31083855911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13449237 + ... + 13451547.

It is an arithmetic number, because the mean of its divisors is an integer number (887591250).

Almost surely, 2^31083855912 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31083855912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42604380000).

31083855912 is an abundant number, since it is smaller than the sum of its proper divisors (54124904088).

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

31083855912 is a wasteful number, since it uses less digits than its factorization.

31083855912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4511 (or 4504 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 45.

The spelling of 31083855912 in words is "thirty-one billion, eighty-three million, eight hundred fifty-five thousand, nine hundred twelve".