85565919 has 4 divisors (see below), whose sum is σ = 114087896. Its totient is φ = 57043944.

The previous prime is 85565917. The next prime is 85565923. The reversal of 85565919 is 91956558.

It is a happy number.

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

It is not a de Polignac number, because 85565919 - 2¹ = 85565917 is a prime.

It is a super-2 number, since 2×85565919² = 14643052988629122, 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 (85565917) 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, 14260984 + ... + 14260989.

It is an arithmetic number, because the mean of its divisors is an integer number (28521974).

Almost surely, 2^85565919 is an apocalyptic number.

85565919 is a deficient number, since it is larger than the sum of its proper divisors (28521977).

85565919 is a wasteful number, since it uses less digits than its factorization.

85565919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28521976.

The product of its digits is 486000, while the sum is 48.

The square root of 85565919 is about 9250.1848089646. The cubic root of 85565919 is about 440.6565937408.

The spelling of 85565919 in words is "eighty-five million, five hundred sixty-five thousand, nine hundred nineteen".