822406221 has 36 divisors (see below), whose sum is σ = 1470107808. Its totient is φ = 433791072.

The previous prime is 822406219. The next prime is 822406253. The reversal of 822406221 is 122604228.

It is a happy number.

It is not a de Polignac number, because 822406221 - 2¹ = 822406219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (822406271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 27975 + ... + 49268.

It is an arithmetic number, because the mean of its divisors is an integer number (40836328).

Almost surely, 2^822406221 is an apocalyptic number.

It is an amenable number.

822406221 is a deficient number, since it is larger than the sum of its proper divisors (647701587).

822406221 is a wasteful number, since it uses less digits than its factorization.

822406221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77282 (or 77266 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 822406221 is about 28677.6257908496. The cubic root of 822406221 is about 936.9047963815.

The spelling of 822406221 in words is "eight hundred twenty-two million, four hundred six thousand, two hundred twenty-one".