31631121363 has 8 divisors (see below), whose sum is σ = 42804303808. Its totient is φ = 20772676584.

The previous prime is 31631121341. The next prime is 31631121373. The reversal of 31631121363 is 36312113613.

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

It is not a de Polignac number, because 31631121363 - 2⁸ = 31631121107 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31631121363.

It is not an unprimeable number, because it can be changed into a prime (31631121323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78684181 + ... + 78684582.

It is an arithmetic number, because the mean of its divisors is an integer number (5350537976).

Almost surely, 2^31631121363 is an apocalyptic number.

31631121363 is a deficient number, since it is larger than the sum of its proper divisors (11173182445).

31631121363 is a wasteful number, since it uses less digits than its factorization.

31631121363 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157368833.

The product of its digits is 5832, while the sum is 30.

Adding to 31631121363 its reverse (36312113613), we get a palindrome (67943234976).

The spelling of 31631121363 in words is "thirty-one billion, six hundred thirty-one million, one hundred twenty-one thousand, three hundred sixty-three".