86255191 has 4 divisors (see below), whose sum is σ = 94096584. Its totient is φ = 78413800.

The previous prime is 86255179. The next prime is 86255207. The reversal of 86255191 is 19155268.

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

It is a cyclic number.

It is not a de Polignac number, because 86255191 - 2²⁵ = 52700759 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 86255191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86255591) 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, 3920680 + ... + 3920701.

It is an arithmetic number, because the mean of its divisors is an integer number (23524146).

Almost surely, 2^86255191 is an apocalyptic number.

86255191 is a deficient number, since it is larger than the sum of its proper divisors (7841393).

86255191 is a wasteful number, since it uses less digits than its factorization.

86255191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7841392.

The product of its digits is 21600, while the sum is 37.

The square root of 86255191 is about 9287.3672803438. The cubic root of 86255191 is about 441.8366598190.

The spelling of 86255191 in words is "eighty-six million, two hundred fifty-five thousand, one hundred ninety-one".