85521306 has 16 divisors (see below), whose sum is σ = 184199904. Its totient is φ = 26314224.

The previous prime is 85521301. The next prime is 85521307. The reversal of 85521306 is 60312558.

It is not an unprimeable number, because it can be changed into a prime (85521301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548136 + ... + 548291.

It is an arithmetic number, because the mean of its divisors is an integer number (11512494).

Almost surely, 2^85521306 is an apocalyptic number.

85521306 is an abundant number, since it is smaller than the sum of its proper divisors (98678598).

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

85521306 is a wasteful number, since it uses less digits than its factorization.

85521306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096445.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 85521306 is about 9247.7730292217. The cubic root of 85521306 is about 440.5799961481.

The spelling of 85521306 in words is "eighty-five million, five hundred twenty-one thousand, three hundred six".