821822441 has 12 divisors (see below), whose sum is σ = 905889600. Its totient is φ = 744990840.

The previous prime is 821822411. The next prime is 821822459. The reversal of 821822441 is 144228128.

821822441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-821822441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 821822398 and 821822407.

It is not an unprimeable number, because it can be changed into a prime (821822411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33980 + ... + 52898.

It is an arithmetic number, because the mean of its divisors is an integer number (75490800).

Almost surely, 2^821822441 is an apocalyptic number.

It is an amenable number.

821822441 is a deficient number, since it is larger than the sum of its proper divisors (84067159).

821822441 is a wasteful number, since it uses less digits than its factorization.

821822441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19300 (or 19289 counting only the distinct ones).

The product of its digits is 8192, while the sum is 32.

The square root of 821822441 is about 28667.4456657722. The cubic root of 821822441 is about 936.6830585368.

The spelling of 821822441 in words is "eight hundred twenty-one million, eight hundred twenty-two thousand, four hundred forty-one".