822431 has 2 divisors, whose sum is σ = 822432. Its totient is φ = 822430.

The previous prime is 822407. The next prime is 822433. The reversal of 822431 is 134228.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-822431 is a prime.

It is a super-2 number, since 2×822431² = 1352785499522, which contains 22 as substring.

Together with 822433, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (822433) 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, 411215 + 411216.

It is an arithmetic number, because the mean of its divisors is an integer number (411216).

2⁸²²⁴³¹ is an apocalyptic number.

822431 is a deficient number, since it is larger than the sum of its proper divisors (1).

822431 is an equidigital number, since it uses as much as digits as its factorization.

822431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 822431 is about 906.8798156316. The cubic root of 822431 is about 93.6914205896.

Adding to 822431 its reverse (134228), we get a palindrome (956659).

The spelling of 822431 in words is "eight hundred twenty-two thousand, four hundred thirty-one".