821444226 has 16 divisors (see below), whose sum is σ = 1643182464. Its totient is φ = 273765744.

The previous prime is 821444201. The next prime is 821444257. The reversal of 821444226 is 622444128.

821444226 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 7 ways as a sum of consecutive naturals, for example, 43800 + ... + 59676.

It is an arithmetic number, because the mean of its divisors is an integer number (102698904).

Almost surely, 2^821444226 is an apocalyptic number.

821444226 is an abundant number, since it is smaller than the sum of its proper divisors (821738238).

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

821444226 is a wasteful number, since it uses less digits than its factorization.

821444226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24505.

The product of its digits is 24576, while the sum is 33.

The square root of 821444226 is about 28660.8483126372. The cubic root of 821444226 is about 936.5393446291.

The spelling of 821444226 in words is "eight hundred twenty-one million, four hundred forty-four thousand, two hundred twenty-six".