822506401 has 4 divisors (see below), whose sum is σ = 822671172. Its totient is φ = 822341632.

The previous prime is 822506383. The next prime is 822506407. The reversal of 822506401 is 104605228.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 165096801 + 657409600 = 12849^2 + 25640^2 .

It is a cyclic number.

It is not a de Polignac number, because 822506401 - 2⁹ = 822505889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 822506401.

It is not an unprimeable number, because it can be changed into a prime (822506407) 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 3 ways as a sum of consecutive naturals, for example, 74656 + ... + 84961.

It is an arithmetic number, because the mean of its divisors is an integer number (205667793).

Almost surely, 2^822506401 is an apocalyptic number.

It is an amenable number.

822506401 is a deficient number, since it is larger than the sum of its proper divisors (164771).

822506401 is a wasteful number, since it uses less digits than its factorization.

822506401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164770.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 822506401 is about 28679.3723955041. The cubic root of 822506401 is about 936.9428373193.

The spelling of 822506401 in words is "eight hundred twenty-two million, five hundred six thousand, four hundred one".