85656171 has 4 divisors (see below), whose sum is σ = 114208232. Its totient is φ = 57104112.

The previous prime is 85656157. The next prime is 85656187. The reversal of 85656171 is 17165658.

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

It is not a de Polignac number, because 85656171 - 2⁹ = 85655659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85656671) 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, 14276026 + ... + 14276031.

It is an arithmetic number, because the mean of its divisors is an integer number (28552058).

Almost surely, 2^85656171 is an apocalyptic number.

85656171 is a deficient number, since it is larger than the sum of its proper divisors (28552061).

85656171 is a wasteful number, since it uses less digits than its factorization.

85656171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28552060.

The product of its digits is 50400, while the sum is 39.

The square root of 85656171 is about 9255.0619122727. The cubic root of 85656171 is about 440.8114691275.

The spelling of 85656171 in words is "eighty-five million, six hundred fifty-six thousand, one hundred seventy-one".