3191399109131 has 4 divisors (see below), whose sum is σ = 3191419946112. Its totient is φ = 3191378272152.

The previous prime is 3191399109121. The next prime is 3191399109203. The reversal of 3191399109131 is 1319019931913.

It is a happy number.

3191399109131 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.

It is a cyclic number.

It is not a de Polignac number, because 3191399109131 - 2³⁸ = 2916521202187 is a prime.

It is a super-2 number, since 2×3191399109131² (a number of 26 digits) contains 22 as substring.

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 3191399109131.

It is not an unprimeable number, because it can be changed into a prime (3191399109121) 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, 10187036 + ... + 10495641.

It is an arithmetic number, because the mean of its divisors is an integer number (797854986528).

Almost surely, 2^{3191399109131} is an apocalyptic number.

3191399109131 is a deficient number, since it is larger than the sum of its proper divisors (20836981).

3191399109131 is a wasteful number, since it uses less digits than its factorization.

3191399109131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20836980.

The product of its (nonzero) digits is 177147, while the sum is 50.

The spelling of 3191399109131 in words is "three trillion, one hundred ninety-one billion, three hundred ninety-nine million, one hundred nine thousand, one hundred thirty-one".