85109212 has 24 divisors (see below), whose sum is σ = 153369216. Its totient is φ = 41302128.

The previous prime is 85109203. The next prime is 85109237. The reversal of 85109212 is 21290158.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27243 + ... + 30205.

It is an arithmetic number, because the mean of its divisors is an integer number (6390384).

Almost surely, 2^85109212 is an apocalyptic number.

It is an amenable number.

85109212 is a deficient number, since it is larger than the sum of its proper divisors (68260004).

85109212 is a wasteful number, since it uses less digits than its factorization.

85109212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3177 (or 3175 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 85109212 is about 9225.4654083141. The cubic root of 85109212 is about 439.8711950799.

The spelling of 85109212 in words is "eighty-five million, one hundred nine thousand, two hundred twelve".