31351982112 has 72 divisors (see below), whose sum is σ = 97262408880. Its totient is φ = 9500599680.

The previous prime is 31351982089. The next prime is 31351982119. The reversal of 31351982112 is 21128915313.

31351982112 is a `hidden beast` number, since 3 + 1 + 351 + 98 + 211 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (31351982119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4945062 + ... + 4951397.

It is an arithmetic number, because the mean of its divisors is an integer number (1350866790).

Almost surely, 2^31351982112 is an apocalyptic number.

31351982112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31351982112 is an abundant number, since it is smaller than the sum of its proper divisors (65910426768).

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

31351982112 is a wasteful number, since it uses less digits than its factorization.

31351982112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9896486 (or 9896475 counting only the distinct ones).

The product of its digits is 12960, while the sum is 36.

The spelling of 31351982112 in words is "thirty-one billion, three hundred fifty-one million, nine hundred eighty-two thousand, one hundred twelve".