85018815 has 40 divisors (see below), whose sum is σ = 174181920. Its totient is φ = 38864448.

The previous prime is 85018781. The next prime is 85018841. The reversal of 85018815 is 51881058.

It is not a de Polignac number, because 85018815 - 2¹² = 85014719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85018815.

It is a congruent number.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 12160 + ... + 17829.

It is an arithmetic number, because the mean of its divisors is an integer number (4354548).

Almost surely, 2^85018815 is an apocalyptic number.

85018815 is an abundant number, since it is smaller than the sum of its proper divisors (89163105).

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

85018815 is a wasteful number, since it uses less digits than its factorization.

85018815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30013 (or 30004 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 36.

The square root of 85018815 is about 9220.5647874737. The cubic root of 85018815 is about 439.7154065284.

The spelling of 85018815 in words is "eighty-five million, eighteen thousand, eight hundred fifteen".