2131189791 has 8 divisors (see below), whose sum is σ = 2842348800. Its totient is φ = 1420411992.

The previous prime is 2131189741. The next prime is 2131189843. The reversal of 2131189791 is 1979811312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2131189791 - 2¹⁷ = 2131058719 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131189741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81991 + ... + 104808.

It is an arithmetic number, because the mean of its divisors is an integer number (355293600).

Almost surely, 2^2131189791 is an apocalyptic number.

2131189791 is a deficient number, since it is larger than the sum of its proper divisors (711159009).

2131189791 is a wasteful number, since it uses less digits than its factorization.

2131189791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190605.

The product of its digits is 27216, while the sum is 42.

The square root of 2131189791 is about 46164.8111769127. The cubic root of 2131189791 is about 1286.8878751174.

The spelling of 2131189791 in words is "two billion, one hundred thirty-one million, one hundred eighty-nine thousand, seven hundred ninety-one".