85521918 has 8 divisors (see below), whose sum is σ = 171043848. Its totient is φ = 28507304.

The previous prime is 85521881. The next prime is 85521959. The reversal of 85521918 is 81912558.

It is a sphenic number, since it is the product of 3 distinct primes.

85521918 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7126821 + ... + 7126832.

It is an arithmetic number, because the mean of its divisors is an integer number (21380481).

Almost surely, 2^85521918 is an apocalyptic number.

85521918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

85521918 is a wasteful number, since it uses less digits than its factorization.

85521918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14253658.

The product of its digits is 28800, while the sum is 39.

The square root of 85521918 is about 9247.8061182099. The cubic root of 85521918 is about 440.5810470921.

The spelling of 85521918 in words is "eighty-five million, five hundred twenty-one thousand, nine hundred eighteen".