115861135131 has 64 divisors (see below), whose sum is σ = 199878476800. Its totient is φ = 64959148800.

The previous prime is 115861135121. The next prime is 115861135141. The reversal of 115861135131 is 131531168511.

115861135131 is a `hidden beast` number, since 1 + 1 + 5 + 8 + 611 + 3 + 5 + 1 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (115861135121) and next prime (115861135141).

It is not a de Polignac number, because 115861135131 - 2⁹ = 115861134619 is a prime.

It is a super-2 number, since 2×115861135131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115861135121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4703076 + ... + 4727646.

It is an arithmetic number, because the mean of its divisors is an integer number (3123101200).

Almost surely, 2^115861135131 is an apocalyptic number.

115861135131 is a deficient number, since it is larger than the sum of its proper divisors (84017341669).

115861135131 is a wasteful number, since it uses less digits than its factorization.

115861135131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25057 (or 25051 counting only the distinct ones).

The product of its digits is 10800, while the sum is 36.

The spelling of 115861135131 in words is "one hundred fifteen billion, eight hundred sixty-one million, one hundred thirty-five thousand, one hundred thirty-one".