85611 has 4 divisors (see below), whose sum is σ = 114152. Its totient is φ = 57072.

The previous prime is 85607. The next prime is 85619. The reversal of 85611 is 11658.

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

It is not a de Polignac number, because 85611 - 2² = 85607 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85619) 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, 14266 + ... + 14271.

It is an arithmetic number, because the mean of its divisors is an integer number (28538).

2⁸⁵⁶¹¹ is an apocalyptic number.

85611 is a deficient number, since it is larger than the sum of its proper divisors (28541).

85611 is a wasteful number, since it uses less digits than its factorization.

85611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28540.

The product of its digits is 240, while the sum is 21.

The square root of 85611 is about 292.5935747757. The cubic root of 85611 is about 44.0733967819.

It can be divided in two parts, 85 and 611, that added together give a palindrome (696).

The spelling of 85611 in words is "eighty-five thousand, six hundred eleven".