3131912885 has 4 divisors (see below), whose sum is σ = 3758295468. Its totient is φ = 2505530304.

The previous prime is 3131912881. The next prime is 3131912887. The reversal of 3131912885 is 5882191313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5882191313 = 271 ⋅21705503.

It can be written as a sum of positive squares in 2 ways, for example, as 939238609 + 2192674276 = 30647^2 + 46826^2 .

It is a cyclic number.

It is not a de Polignac number, because 3131912885 - 2² = 3131912881 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131912881) 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, 313191284 + ... + 313191293.

It is an arithmetic number, because the mean of its divisors is an integer number (939573867).

Almost surely, 2^3131912885 is an apocalyptic number.

It is an amenable number.

3131912885 is a deficient number, since it is larger than the sum of its proper divisors (626382583).

3131912885 is an equidigital number, since it uses as much as digits as its factorization.

3131912885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626382582.

The product of its digits is 51840, while the sum is 41.

The square root of 3131912885 is about 55963.4960040918. The cubic root of 3131912885 is about 1463.0861230696.

The spelling of 3131912885 in words is "three billion, one hundred thirty-one million, nine hundred twelve thousand, eight hundred eighty-five".