85173015 has 16 divisors (see below), whose sum is σ = 136848096. Its totient is φ = 45235200.

The previous prime is 85172987. The next prime is 85173047. The reversal of 85173015 is 51037158.

It is not a de Polignac number, because 85173015 - 2⁶ = 85172951 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 8166 + ... + 15395.

It is an arithmetic number, because the mean of its divisors is an integer number (8553006).

Almost surely, 2^85173015 is an apocalyptic number.

85173015 is a deficient number, since it is larger than the sum of its proper divisors (51675081).

85173015 is a wasteful number, since it uses less digits than its factorization.

85173015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23810.

The product of its (nonzero) digits is 4200, while the sum is 30.

The square root of 85173015 is about 9228.9227432025. The cubic root of 85173015 is about 439.9810856194.

The spelling of 85173015 in words is "eighty-five million, one hundred seventy-three thousand, fifteen".