85686231 has 16 divisors (see below), whose sum is σ = 116524800. Its totient is φ = 55991808.

The previous prime is 85686221. The next prime is 85686241. The reversal of 85686231 is 13268658.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85686221) and next prime (85686241).

It is not a de Polignac number, because 85686231 - 2¹⁰ = 85685207 is a prime.

It is a super-2 number, since 2×85686231² = 14684260365970722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 85686231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85686221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 101710 + ... + 102548.

It is an arithmetic number, because the mean of its divisors is an integer number (7282800).

Almost surely, 2^85686231 is an apocalyptic number.

85686231 is a deficient number, since it is larger than the sum of its proper divisors (30838569).

85686231 is a wasteful number, since it uses less digits than its factorization.

85686231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1478.

The product of its digits is 69120, while the sum is 39.

The square root of 85686231 is about 9256.6857459892. The cubic root of 85686231 is about 440.8630289191.

The spelling of 85686231 in words is "eighty-five million, six hundred eighty-six thousand, two hundred thirty-one".