85521183 has 8 divisors (see below), whose sum is σ = 124394496. Its totient is φ = 51831000.

The previous prime is 85521173. The next prime is 85521217. The reversal of 85521183 is 38112558.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85521183 - 2⁴ = 85521167 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 2591551 = 85521183 / (8 + 5 + 5 + 2 + 1 + 1 + 8 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85521103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1295743 + ... + 1295808.

It is an arithmetic number, because the mean of its divisors is an integer number (15549312).

Almost surely, 2^85521183 is an apocalyptic number.

85521183 is a deficient number, since it is larger than the sum of its proper divisors (38873313).

85521183 is a wasteful number, since it uses less digits than its factorization.

85521183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591565.

The product of its digits is 9600, while the sum is 33.

The square root of 85521183 is about 9247.7663789696. The cubic root of 85521183 is about 440.5797849283.

The spelling of 85521183 in words is "eighty-five million, five hundred twenty-one thousand, one hundred eighty-three".