856222542 has 128 divisors (see below), whose sum is σ = 2272665600. Its totient is φ = 233798400.

The previous prime is 856222531. The next prime is 856222553. The reversal of 856222542 is 245222658.

856222542 is a `hidden beast` number, since 8 + 5 + 622 + 25 + 4 + 2 = 666.

856222542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (856222531) and next prime (856222553).

It is a junction number, because it is equal to n+sod(n) for n = 856222497 and 856222506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1042492 + ... + 1043312.

It is an arithmetic number, because the mean of its divisors is an integer number (17755200).

Almost surely, 2^856222542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856222542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1136332800).

856222542 is an abundant number, since it is smaller than the sum of its proper divisors (1416443058).

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

856222542 is a wasteful number, since it uses less digits than its factorization.

856222542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959 (or 953 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 856222542 is about 29261.2805939863. The cubic root of 856222542 is about 949.5741552160.

The spelling of 856222542 in words is "eight hundred fifty-six million, two hundred twenty-two thousand, five hundred forty-two".