822641431 has 2 divisors, whose sum is σ = 822641432. Its totient is φ = 822641430.

The previous prime is 822641419. The next prime is 822641447. The reversal of 822641431 is 134146228.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 822641431 - 2¹¹ = 822639383 is a prime.

It is a super-2 number, since 2×822641431² = 1353477847995455522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 822641393 and 822641402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822641731) 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 as a sum of consecutive naturals, namely, 411320715 + 411320716.

It is an arithmetic number, because the mean of its divisors is an integer number (411320716).

Almost surely, 2^822641431 is an apocalyptic number.

822641431 is a deficient number, since it is larger than the sum of its proper divisors (1).

822641431 is an equidigital number, since it uses as much as digits as its factorization.

822641431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 31.

The square root of 822641431 is about 28681.7264299066. The cubic root of 822641431 is about 936.9941068164.

Adding to 822641431 its reverse (134146228), we get a palindrome (956787659).

The spelling of 822641431 in words is "eight hundred twenty-two million, six hundred forty-one thousand, four hundred thirty-one".