85111 has 4 divisors (see below), whose sum is σ = 91672. Its totient is φ = 78552.

The previous prime is 85109. The next prime is 85121. The reversal of 85111 is 11158.

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 85111 - 2¹ = 85109 is a prime.

It is a Duffinian number.

85111 is a modest number, since divided by 111 gives 85 as remainder.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85121) 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, 3261 + ... + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (22918).

2⁸⁵¹¹¹ is an apocalyptic number.

85111 is a deficient number, since it is larger than the sum of its proper divisors (6561).

85111 is a wasteful number, since it uses less digits than its factorization.

85111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6560.

The product of its digits is 40, while the sum is 16.

The square root of 85111 is about 291.7378960643. The cubic root of 85111 is about 43.9874275374.

Adding to 85111 its reverse (11158), we get a palindrome (96269).

It can be divided in two parts, 85 and 111, that added together give a square (196 = 14²).

The spelling of 85111 in words is "eighty-five thousand, one hundred eleven".