531504023 has 2 divisors, whose sum is σ = 531504024. Its totient is φ = 531504022.

The previous prime is 531504011. The next prime is 531504047. The reversal of 531504023 is 320405135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531504023 - 2⁸ = 531503767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531504023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531501023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265752011 + 265752012.

It is an arithmetic number, because the mean of its divisors is an integer number (265752012).

Almost surely, 2^531504023 is an apocalyptic number.

531504023 is a deficient number, since it is larger than the sum of its proper divisors (1).

531504023 is an equidigital number, since it uses as much as digits as its factorization.

531504023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 531504023 is about 23054.3710172279. The cubic root of 531504023 is about 810.0320177356.

Adding to 531504023 its reverse (320405135), we get a palindrome (851909158).

The spelling of 531504023 in words is "five hundred thirty-one million, five hundred four thousand, twenty-three".