851856223 has 8 divisors (see below), whose sum is σ = 879671936. Its totient is φ = 824061600.

The previous prime is 851856197. The next prime is 851856253. The reversal of 851856223 is 322658158.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 851856223 - 2⁵ = 851856191 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 (851856253) 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 7 ways as a sum of consecutive naturals, for example, 147865 + ... + 153517.

It is an arithmetic number, because the mean of its divisors is an integer number (109958992).

Almost surely, 2^851856223 is an apocalyptic number.

851856223 is a deficient number, since it is larger than the sum of its proper divisors (27815713).

851856223 is a wasteful number, since it uses less digits than its factorization.

851856223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10545.

The product of its digits is 115200, while the sum is 40.

The square root of 851856223 is about 29186.5760753124. The cubic root of 851856223 is about 947.9572813778.

The spelling of 851856223 in words is "eight hundred fifty-one million, eight hundred fifty-six thousand, two hundred twenty-three".