858256223 has 4 divisors (see below), whose sum is σ = 936279528. Its totient is φ = 780232920.

The previous prime is 858256193. The next prime is 858256229. The reversal of 858256223 is 322652858.

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 858256223 - 2¹⁸ = 857994079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858256229) 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, 39011636 + ... + 39011657.

It is an arithmetic number, because the mean of its divisors is an integer number (234069882).

Almost surely, 2^858256223 is an apocalyptic number.

858256223 is a deficient number, since it is larger than the sum of its proper divisors (78023305).

858256223 is a wasteful number, since it uses less digits than its factorization.

858256223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78023304.

The product of its digits is 230400, while the sum is 41.

The square root of 858256223 is about 29296.0103597742. The cubic root of 858256223 is about 950.3253633466.

The spelling of 858256223 in words is "eight hundred fifty-eight million, two hundred fifty-six thousand, two hundred twenty-three".