86115591 has 24 divisors (see below), whose sum is σ = 133879824. Its totient is φ = 53141760.

The previous prime is 86115583. The next prime is 86115607. The reversal of 86115591 is 19551168.

86115591 is a `hidden beast` number, since 8 + 61 + 1 + 5 + 591 = 666.

It is not a de Polignac number, because 86115591 - 2³ = 86115583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86115191) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4720 + ... + 13946.

It is an arithmetic number, because the mean of its divisors is an integer number (5578326).

Almost surely, 2^86115591 is an apocalyptic number.

86115591 is a deficient number, since it is larger than the sum of its proper divisors (47764233).

86115591 is a wasteful number, since it uses less digits than its factorization.

86115591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9311 (or 9308 counting only the distinct ones).

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

The square root of 86115591 is about 9279.8486517831. The cubic root of 86115591 is about 441.5981671070.

The spelling of 86115591 in words is "eighty-six million, one hundred fifteen thousand, five hundred ninety-one".