31029970885 has 16 divisors (see below), whose sum is σ = 39434106096. Its totient is φ = 23359126528.

The previous prime is 31029970871. The next prime is 31029970891. The reversal of 31029970885 is 58807992013.

It can be written as a sum of positive squares in 8 ways, for example, as 239197156 + 30790773729 = 15466^2 + 175473^2 .

It is a cyclic number.

It is not a de Polignac number, because 31029970885 - 2⁷ = 31029970757 is a prime.

It is a Duffinian number.

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, 432219 + ... + 498871.

It is an arithmetic number, because the mean of its divisors is an integer number (2464631631).

Almost surely, 2^31029970885 is an apocalyptic number.

It is an amenable number.

31029970885 is a deficient number, since it is larger than the sum of its proper divisors (8404135211).

31029970885 is a wasteful number, since it uses less digits than its factorization.

31029970885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72152.

The product of its (nonzero) digits is 1088640, while the sum is 52.

The spelling of 31029970885 in words is "thirty-one billion, twenty-nine million, nine hundred seventy thousand, eight hundred eighty-five".