531823 has 2 divisors, whose sum is σ = 531824. Its totient is φ = 531822.

The previous prime is 531821. The next prime is 531827. The reversal of 531823 is 328135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531823 - 2¹ = 531821 is a prime.

Together with 531821, it forms a pair of twin primes.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 531794 and 531803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531821) 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, 265911 + 265912.

It is an arithmetic number, because the mean of its divisors is an integer number (265912).

2⁵³¹⁸²³ is an apocalyptic number.

531823 is a deficient number, since it is larger than the sum of its proper divisors (1).

531823 is an equidigital number, since it uses as much as digits as its factorization.

531823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 531823 is about 729.2619556785. The cubic root of 531823 is about 81.0194029624.

Adding to 531823 its reverse (328135), we get a palindrome (859958).

The spelling of 531823 in words is "five hundred thirty-one thousand, eight hundred twenty-three".