85531218 has 16 divisors (see below), whose sum is σ = 171416736. Its totient is φ = 28451360.

The previous prime is 85531189. The next prime is 85531219. The reversal of 85531218 is 81213558.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (85531219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11571 + ... + 17462.

It is an arithmetic number, because the mean of its divisors is an integer number (10713546).

Almost surely, 2^85531218 is an apocalyptic number.

85531218 is an abundant number, since it is smaller than the sum of its proper divisors (85885518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85531218 is a wasteful number, since it uses less digits than its factorization.

85531218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29529.

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

The square root of 85531218 is about 9248.3089265011. The cubic root of 85531218 is about 440.5970167028.

The spelling of 85531218 in words is "eighty-five million, five hundred thirty-one thousand, two hundred eighteen".