85855771 has 4 divisors (see below), whose sum is σ = 88625344. Its totient is φ = 83086200.

The previous prime is 85855751. The next prime is 85855789. The reversal of 85855771 is 17755858.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-85855771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85855741) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1384740 + ... + 1384801.

It is an arithmetic number, because the mean of its divisors is an integer number (22156336).

Almost surely, 2^85855771 is an apocalyptic number.

85855771 is a deficient number, since it is larger than the sum of its proper divisors (2769573).

85855771 is a wasteful number, since it uses less digits than its factorization.

85855771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769572.

The product of its digits is 392000, while the sum is 46.

The square root of 85855771 is about 9265.8389258609. The cubic root of 85855771 is about 441.1536033195.

The spelling of 85855771 in words is "eighty-five million, eight hundred fifty-five thousand, seven hundred seventy-one".