31912071072 has 192 divisors, whose sum is σ = 101992504320. Its totient is φ = 8533499904.

The previous prime is 31912071017. The next prime is 31912071083. The reversal of 31912071072 is 27017021913.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1044688 + ... + 1074800.

It is an arithmetic number, because the mean of its divisors is an integer number (531210960).

Almost surely, 2^31912071072 is an apocalyptic number.

31912071072 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31912071072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50996252160).

31912071072 is an abundant number, since it is smaller than the sum of its proper divisors (70080433248).

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

31912071072 is a wasteful number, since it uses less digits than its factorization.

31912071072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30235 (or 30227 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

Adding to 31912071072 its reverse (27017021913), we get a palindrome (58929092985).

The spelling of 31912071072 in words is "thirty-one billion, nine hundred twelve million, seventy-one thousand, seventy-two".