86131523 has 4 divisors (see below), whose sum is σ = 88459440. Its totient is φ = 83803608.

The previous prime is 86131517. The next prime is 86131531. The reversal of 86131523 is 32513168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-86131523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86131723) 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, 1163903 + ... + 1163976.

It is an arithmetic number, because the mean of its divisors is an integer number (22114860).

Almost surely, 2^86131523 is an apocalyptic number.

86131523 is a deficient number, since it is larger than the sum of its proper divisors (2327917).

86131523 is a wasteful number, since it uses less digits than its factorization.

86131523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327916.

The product of its digits is 4320, while the sum is 29.

The square root of 86131523 is about 9280.7070312558. The cubic root of 86131523 is about 441.6253983671.

The spelling of 86131523 in words is "eighty-six million, one hundred thirty-one thousand, five hundred twenty-three".