31631243113 has 8 divisors (see below), whose sum is σ = 31796704800. Its totient is φ = 31466210688.

The previous prime is 31631243107. The next prime is 31631243123. The reversal of 31631243113 is 31134213613.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31631243113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31631243123) 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 7 ways as a sum of consecutive naturals, for example, 40978 + ... + 254836.

It is an arithmetic number, because the mean of its divisors is an integer number (3974588100).

Almost surely, 2^31631243113 is an apocalyptic number.

It is an amenable number.

31631243113 is a deficient number, since it is larger than the sum of its proper divisors (165461687).

31631243113 is a wasteful number, since it uses less digits than its factorization.

31631243113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214631.

The product of its digits is 3888, while the sum is 28.

Adding to 31631243113 its reverse (31134213613), we get a palindrome (62765456726).

The spelling of 31631243113 in words is "thirty-one billion, six hundred thirty-one million, two hundred forty-three thousand, one hundred thirteen".