3161988881 has 4 divisors (see below), whose sum is σ = 3175219200. Its totient is φ = 3148758564.

The previous prime is 3161988857. The next prime is 3161988887. The reversal of 3161988881 is 1888891613.

3161988881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1888891613 = 7 ⋅269841659.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3161988881 is a prime.

It is a super-2 number, since 2×3161988881² = 19996347367135264322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3161988887) 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, 6614801 + ... + 6615278.

It is an arithmetic number, because the mean of its divisors is an integer number (793804800).

Almost surely, 2^3161988881 is an apocalyptic number.

It is an amenable number.

3161988881 is a deficient number, since it is larger than the sum of its proper divisors (13230319).

3161988881 is a wasteful number, since it uses less digits than its factorization.

3161988881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13230318.

The product of its digits is 663552, while the sum is 53.

The square root of 3161988881 is about 56231.5648101669. The cubic root of 3161988881 is about 1467.7545864565.

The spelling of 3161988881 in words is "three billion, one hundred sixty-one million, nine hundred eighty-eight thousand, eight hundred eighty-one".