43158172131 has 12 divisors (see below), whose sum is σ = 64350536640. Its totient is φ = 27843981840.

The previous prime is 43158172111. The next prime is 43158172147. The reversal of 43158172131 is 13127185134.

43158172131 is a `hidden beast` number, since 4 + 3 + 1 + 581 + 72 + 1 + 3 + 1 = 666.

43158172131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43158172131 - 2³¹ = 41010688483 is a prime.

It is a super-3 number, since 3×43158172131³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (43158172111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77344116 + ... + 77344673.

It is an arithmetic number, because the mean of its divisors is an integer number (5362544720).

Almost surely, 2^43158172131 is an apocalyptic number.

43158172131 is a deficient number, since it is larger than the sum of its proper divisors (21192364509).

43158172131 is a wasteful number, since it uses less digits than its factorization.

43158172131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154688826 (or 154688823 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The spelling of 43158172131 in words is "forty-three billion, one hundred fifty-eight million, one hundred seventy-two thousand, one hundred thirty-one".