824231 has 2 divisors, whose sum is σ = 824232. Its totient is φ = 824230.

The previous prime is 824227. The next prime is 824233. The reversal of 824231 is 132428.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 824231 - 2² = 824227 is a prime.

It is a super-2 number, since 2×824231² = 1358713482722, which contains 22 as substring.

Together with 824233, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (824233) 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, 412115 + 412116.

It is an arithmetic number, because the mean of its divisors is an integer number (412116).

2⁸²⁴²³¹ is an apocalyptic number.

824231 is a deficient number, since it is larger than the sum of its proper divisors (1).

824231 is an equidigital number, since it uses as much as digits as its factorization.

824231 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 824231 is about 907.8716869690. The cubic root of 824231 is about 93.7597228435.

Adding to 824231 its reverse (132428), we get a palindrome (956659).

The spelling of 824231 in words is "eight hundred twenty-four thousand, two hundred thirty-one".