31685233848 has 16 divisors (see below), whose sum is σ = 79213084680. Its totient is φ = 10561744608.

The previous prime is 31685233841. The next prime is 31685233861. The reversal of 31685233848 is 84833258613.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 31685233848.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31685233841) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 660109015 + ... + 660109062.

Almost surely, 2^31685233848 is an apocalyptic number.

It is an amenable number.

31685233848 is an abundant number, since it is smaller than the sum of its proper divisors (47527850832).

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

31685233848 is a wasteful number, since it uses less digits than its factorization.

31685233848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1320218086 (or 1320218082 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 51.

The spelling of 31685233848 in words is "thirty-one billion, six hundred eighty-five million, two hundred thirty-three thousand, eight hundred forty-eight".