3131189385 has 16 divisors (see below), whose sum is σ = 5104430784. Its totient is φ = 1638458432.

The previous prime is 3131189381. The next prime is 3131189401. The reversal of 3131189385 is 5839811313.

It is a cyclic number.

It is not a de Polignac number, because 3131189385 - 2² = 3131189381 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131189381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1968507 + ... + 1970096.

It is an arithmetic number, because the mean of its divisors is an integer number (319026924).

Almost surely, 2^3131189385 is an apocalyptic number.

It is an amenable number.

3131189385 is a deficient number, since it is larger than the sum of its proper divisors (1973241399).

3131189385 is a wasteful number, since it uses less digits than its factorization.

3131189385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3938664.

The product of its digits is 77760, while the sum is 42.

The square root of 3131189385 is about 55957.0315956806. The cubic root of 3131189385 is about 1462.9734523824.

The spelling of 3131189385 in words is "three billion, one hundred thirty-one million, one hundred eighty-nine thousand, three hundred eighty-five".