31708813056 has 72 divisors (see below), whose sum is σ = 84661948560. Its totient is φ = 10535755776.

The previous prime is 31708813033. The next prime is 31708813057. The reversal of 31708813056 is 65031880713.

It is a junction number, because it is equal to n+sod(n) for n = 31708812999 and 31708813017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31708813057) 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, 174430 + ... + 306338.

Almost surely, 2^31708813056 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 31708813056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42330974280).

31708813056 is an abundant number, since it is smaller than the sum of its proper divisors (52953135504).

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

31708813056 is a wasteful number, since it uses less digits than its factorization.

31708813056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132241 (or 132227 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 31708813056 in words is "thirty-one billion, seven hundred eight million, eight hundred thirteen thousand, fifty-six".