85648521 has 12 divisors (see below), whose sum is σ = 132842832. Its totient is φ = 48941928.

The previous prime is 85648501. The next prime is 85648531. The reversal of 85648521 is 12584658.

It is not a de Polignac number, because 85648521 - 2⁵ = 85648489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85648521.

It is not an unprimeable number, because it can be changed into a prime (85648501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 291175 + ... + 291468.

It is an arithmetic number, because the mean of its divisors is an integer number (11070236).

Almost surely, 2^85648521 is an apocalyptic number.

It is an amenable number.

85648521 is a deficient number, since it is larger than the sum of its proper divisors (47194311).

85648521 is a wasteful number, since it uses less digits than its factorization.

85648521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582660 (or 582653 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 85648521 is about 9254.6486156958. The cubic root of 85648521 is about 440.7983456981.

The spelling of 85648521 in words is "eighty-five million, six hundred forty-eight thousand, five hundred twenty-one".