85566211 has 4 divisors (see below), whose sum is σ = 88516800. Its totient is φ = 82615624.

The previous prime is 85566209. The next prime is 85566223. The reversal of 85566211 is 11266558.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85566211 - 2¹ = 85566209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85566251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1475251 + ... + 1475308.

It is an arithmetic number, because the mean of its divisors is an integer number (22129200).

Almost surely, 2^85566211 is an apocalyptic number.

85566211 is a deficient number, since it is larger than the sum of its proper divisors (2950589).

85566211 is a wasteful number, since it uses less digits than its factorization.

85566211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950588.

The product of its digits is 14400, while the sum is 34.

The square root of 85566211 is about 9250.2005924196. The cubic root of 85566211 is about 440.6570949980.

The spelling of 85566211 in words is "eighty-five million, five hundred sixty-six thousand, two hundred eleven".