85586831 has 4 divisors (see below), whose sum is σ = 93367464. Its totient is φ = 77806200.

The previous prime is 85586827. The next prime is 85586833. The reversal of 85586831 is 13868558.

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 85586831 - 2² = 85586827 is a prime.

It is a super-2 number, since 2×85586831² = 14650211281245122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85586833) 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, 3890300 + ... + 3890321.

It is an arithmetic number, because the mean of its divisors is an integer number (23341866).

Almost surely, 2^85586831 is an apocalyptic number.

85586831 is a deficient number, since it is larger than the sum of its proper divisors (7780633).

85586831 is a wasteful number, since it uses less digits than its factorization.

85586831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7780632.

The product of its digits is 230400, while the sum is 44.

The square root of 85586831 is about 9251.3150957040. The cubic root of 85586831 is about 440.6924891074.

The spelling of 85586831 in words is "eighty-five million, five hundred eighty-six thousand, eight hundred thirty-one".