31656112887 has 8 divisors (see below), whose sum is σ = 48237886336. Its totient is φ = 18089207352.

The previous prime is 31656112883. The next prime is 31656112889. The reversal of 31656112887 is 78821165613.

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

It is not a de Polignac number, because 31656112887 - 2² = 31656112883 is a prime.

It is a super-2 number, since 2×31656112887² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31656112883) 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, 753716953 + ... + 753716994.

It is an arithmetic number, because the mean of its divisors is an integer number (6029735792).

Almost surely, 2^31656112887 is an apocalyptic number.

31656112887 is a deficient number, since it is larger than the sum of its proper divisors (16581773449).

31656112887 is a wasteful number, since it uses less digits than its factorization.

31656112887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1507433957.

The product of its digits is 483840, while the sum is 48.

The spelling of 31656112887 in words is "thirty-one billion, six hundred fifty-six million, one hundred twelve thousand, eight hundred eighty-seven".