31831688613813 has 64 divisors (see below), whose sum is σ = 46851100876800. Its totient is φ = 19064261376000.

The previous prime is 31831688613793. The next prime is 31831688613899.

It is a happy number.

31831688613813 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-31831688613813 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31831688613313) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 681874833 + ... + 681921513.

It is an arithmetic number, because the mean of its divisors is an integer number (732048451200).

Almost surely, 2^{31831688613813} is an apocalyptic number.

31831688613813 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31831688613813 is a deficient number, since it is larger than the sum of its proper divisors (15019412262987).

31831688613813 is a wasteful number, since it uses less digits than its factorization.

31831688613813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47594.

The product of its digits is 11943936, while the sum is 60.

The spelling of 31831688613813 in words is "thirty-one trillion, eight hundred thirty-one billion, six hundred eighty-eight million, six hundred thirteen thousand, eight hundred thirteen".