31607881652 has 48 divisors (see below), whose sum is σ = 61335429120. Its totient is φ = 14176031232.

The previous prime is 31607881649. The next prime is 31607881673. The reversal of 31607881652 is 25618870613.

It is a junction number, because it is equal to n+sod(n) for n = 31607881597 and 31607881606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 396749 + ... + 469707.

It is an arithmetic number, because the mean of its divisors is an integer number (1277821440).

Almost surely, 2^31607881652 is an apocalyptic number.

It is an amenable number.

31607881652 is a deficient number, since it is larger than the sum of its proper divisors (29727547468).

31607881652 is a wasteful number, since it uses less digits than its factorization.

31607881652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73280 (or 73278 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 47.

The spelling of 31607881652 in words is "thirty-one billion, six hundred seven million, eight hundred eighty-one thousand, six hundred fifty-two".