85521018 has 32 divisors (see below), whose sum is σ = 187323840. Its totient is φ = 25813760.

The previous prime is 85521013. The next prime is 85521041. The reversal of 85521018 is 81012558.

It is not an unprimeable number, because it can be changed into a prime (85521013) 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, 15346 + ... + 20162.

It is an arithmetic number, because the mean of its divisors is an integer number (5853870).

Almost surely, 2^85521018 is an apocalyptic number.

85521018 is an abundant number, since it is smaller than the sum of its proper divisors (101802822).

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

85521018 is a wasteful number, since it uses less digits than its factorization.

85521018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102.

The product of its (nonzero) digits is 3200, while the sum is 30.

The square root of 85521018 is about 9247.7574578922. The cubic root of 85521018 is about 440.5795015844.

The spelling of 85521018 in words is "eighty-five million, five hundred twenty-one thousand, eighteen".