85181223 has 8 divisors (see below), whose sum is σ = 113657200. Its totient is φ = 56746368.

The previous prime is 85181219. The next prime is 85181251. The reversal of 85181223 is 32218158.

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

It is not a de Polignac number, because 85181223 - 2² = 85181219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85181263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5068 + ... + 14001.

It is an arithmetic number, because the mean of its divisors is an integer number (14207150).

Almost surely, 2^85181223 is an apocalyptic number.

85181223 is a deficient number, since it is larger than the sum of its proper divisors (28475977).

85181223 is a wasteful number, since it uses less digits than its factorization.

85181223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20561.

The product of its digits is 3840, while the sum is 30.

The square root of 85181223 is about 9229.3674214434. The cubic root of 85181223 is about 439.9952186120.

The spelling of 85181223 in words is "eighty-five million, one hundred eighty-one thousand, two hundred twenty-three".