822710721 has 16 divisors (see below), whose sum is σ = 1274208128. Its totient is φ = 462412800.

The previous prime is 822710711. The next prime is 822710729. The reversal of 822710721 is 127017228.

It is a happy number.

It is not a de Polignac number, because 822710721 - 2⁵ = 822710689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (822710729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 319840 + ... + 322401.

It is an arithmetic number, because the mean of its divisors is an integer number (79638008).

Almost surely, 2^822710721 is an apocalyptic number.

It is an amenable number.

822710721 is a deficient number, since it is larger than the sum of its proper divisors (451497407).

822710721 is a wasteful number, since it uses less digits than its factorization.

822710721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642312.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 822710721 is about 28682.9343164189. The cubic root of 822710721 is about 937.0204133360.

Adding to 822710721 its reverse (127017228), we get a palindrome (949727949).

The spelling of 822710721 in words is "eight hundred twenty-two million, seven hundred ten thousand, seven hundred twenty-one".