31713388881216 has 112 divisors (see below), whose sum is σ = 97852293398400. Its totient is φ = 9060968232960.

The previous prime is 31713388881211. The next prime is 31713388881227. The reversal of 31713388881216 is 61218888331713.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 31713388881216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31713388881211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240712425 + ... + 240844136.

Almost surely, 2^{31713388881216} is an apocalyptic number.

It is an amenable number.

31713388881216 is an abundant number, since it is smaller than the sum of its proper divisors (66138904517184).

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

31713388881216 is an equidigital number, since it uses as much as digits as its factorization.

31713388881216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481556597 (or 481556573 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The spelling of 31713388881216 in words is "thirty-one trillion, seven hundred thirteen billion, three hundred eighty-eight million, eight hundred eighty-one thousand, two hundred sixteen".