856530223 has 4 divisors (see below), whose sum is σ = 856648800. Its totient is φ = 856411648.

The previous prime is 856530161. The next prime is 856530229. The reversal of 856530223 is 322035658.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-856530223 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 (856530229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47698 + ... + 63151.

It is an arithmetic number, because the mean of its divisors is an integer number (214162200).

Almost surely, 2^856530223 is an apocalyptic number.

856530223 is a deficient number, since it is larger than the sum of its proper divisors (118577).

856530223 is a wasteful number, since it uses less digits than its factorization.

856530223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118576.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 856530223 is about 29266.5375984246. The cubic root of 856530223 is about 949.6878838018.

The spelling of 856530223 in words is "eight hundred fifty-six million, five hundred thirty thousand, two hundred twenty-three".