856222506 has 24 divisors (see below), whose sum is σ = 1919120580. Its totient is φ = 275565696.

The previous prime is 856222469. The next prime is 856222531. The reversal of 856222506 is 605222658.

856222506 is a `hidden beast` number, since 8 + 5 + 622 + 25 + 0 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 830304225 + 25918281 = 28815^2 + 5091^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 819615 + ... + 820658.

Almost surely, 2^856222506 is an apocalyptic number.

856222506 is an abundant number, since it is smaller than the sum of its proper divisors (1062898074).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

856222506 is a wasteful number, since it uses less digits than its factorization.

856222506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1640310 (or 1640307 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 856222506 is about 29261.2799788389. The cubic root of 856222506 is about 949.5741419077.

The spelling of 856222506 in words is "eight hundred fifty-six million, two hundred twenty-two thousand, five hundred six".