85215556 has 12 divisors (see below), whose sum is σ = 149768892. Its totient is φ = 42424448.

The previous prime is 85215547. The next prime is 85215563. The reversal of 85215556 is 65551258.

It can be written as a sum of positive squares in 2 ways, for example, as 13542400 + 71673156 = 3680^2 + 8466^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44785 + ... + 46648.

It is an arithmetic number, because the mean of its divisors is an integer number (12480741).

Almost surely, 2^85215556 is an apocalyptic number.

It is an amenable number.

85215556 is a deficient number, since it is larger than the sum of its proper divisors (64553336).

85215556 is a wasteful number, since it uses less digits than its factorization.

85215556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91670 (or 91668 counting only the distinct ones).

The product of its digits is 60000, while the sum is 37.

The square root of 85215556 is about 9231.2272206896. The cubic root of 85215556 is about 440.0543252483.

The spelling of 85215556 in words is "eighty-five million, two hundred fifteen thousand, five hundred fifty-six".