31889870771 has 12 divisors (see below), whose sum is σ = 35067529056. Its totient is φ = 28978363920.

The previous prime is 31889870759. The next prime is 31889870791. The reversal of 31889870771 is 17707898813.

It is a de Polignac number, because none of the positive numbers 2^k-31889870771 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 31889870771.

It is not an unprimeable number, because it can be changed into a prime (31889870741) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233045 + ... + 343641.

It is an arithmetic number, because the mean of its divisors is an integer number (2922294088).

Almost surely, 2^31889870771 is an apocalyptic number.

31889870771 is a deficient number, since it is larger than the sum of its proper divisors (3177658285).

31889870771 is a wasteful number, since it uses less digits than its factorization.

31889870771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113002 (or 112991 counting only the distinct ones).

The product of its (nonzero) digits is 4741632, while the sum is 59.

The spelling of 31889870771 in words is "thirty-one billion, eight hundred eighty-nine million, eight hundred seventy thousand, seven hundred seventy-one".