85288521 has 16 divisors (see below), whose sum is σ = 116019968. Its totient is φ = 55717200.

The previous prime is 85288519. The next prime is 85288547. The reversal of 85288521 is 12588258.

It is not a de Polignac number, because 85288521 - 2¹ = 85288519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85288521.

It is not an unprimeable number, because it can be changed into a prime (85288121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41406 + ... + 43416.

It is an arithmetic number, because the mean of its divisors is an integer number (7251248).

Almost surely, 2^85288521 is an apocalyptic number.

It is an amenable number.

85288521 is a deficient number, since it is larger than the sum of its proper divisors (30731447).

85288521 is a wasteful number, since it uses less digits than its factorization.

85288521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2292.

The product of its digits is 51200, while the sum is 39.

The square root of 85288521 is about 9235.1784498189. The cubic root of 85288521 is about 440.1798868456.

The spelling of 85288521 in words is "eighty-five million, two hundred eighty-eight thousand, five hundred twenty-one".