85855213 has 4 divisors (see below), whose sum is σ = 88624768. Its totient is φ = 83085660.

The previous prime is 85855199. The next prime is 85855241. The reversal of 85855213 is 31255858.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85855213 - 2⁹ = 85854701 is a prime.

It is a super-2 number, since 2×85855213² = 14742235198550738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85855013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1384731 + ... + 1384792.

It is an arithmetic number, because the mean of its divisors is an integer number (22156192).

Almost surely, 2^85855213 is an apocalyptic number.

It is an amenable number.

85855213 is a deficient number, since it is larger than the sum of its proper divisors (2769555).

85855213 is a wasteful number, since it uses less digits than its factorization.

85855213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2769554.

The product of its digits is 48000, while the sum is 37.

The square root of 85855213 is about 9265.8088152087. The cubic root of 85855213 is about 441.1526475917.

It can be divided in two parts, 85855 and 213, that added together give a palindrome (86068).

The spelling of 85855213 in words is "eighty-five million, eight hundred fifty-five thousand, two hundred thirteen".