821825256 has 64 divisors (see below), whose sum is σ = 2396016000. Its totient is φ = 234804864.

The previous prime is 821825243. The next prime is 821825273. The reversal of 821825256 is 652528128.

821825256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41685 + ... + 58148.

It is an arithmetic number, because the mean of its divisors is an integer number (37437750).

Almost surely, 2^821825256 is an apocalyptic number.

It is an amenable number.

821825256 is an abundant number, since it is smaller than the sum of its proper divisors (1574190744).

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

821825256 is a wasteful number, since it uses less digits than its factorization.

821825256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99863 (or 99845 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 821825256 is about 28667.4947632331. The cubic root of 821825256 is about 936.6841280135.

The spelling of 821825256 in words is "eight hundred twenty-one million, eight hundred twenty-five thousand, two hundred fifty-six".