531045023 has 2 divisors, whose sum is σ = 531045024. Its totient is φ = 531045022.

The previous prime is 531045019. The next prime is 531045029. The reversal of 531045023 is 320540135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531045023 - 2² = 531045019 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531045023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531045029) 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, 265522511 + 265522512.

It is an arithmetic number, because the mean of its divisors is an integer number (265522512).

Almost surely, 2^531045023 is an apocalyptic number.

531045023 is a deficient number, since it is larger than the sum of its proper divisors (1).

531045023 is an equidigital number, since it uses as much as digits as its factorization.

531045023 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 531045023 is about 23044.4141387886. The cubic root of 531045023 is about 809.7987728556.

Adding to 531045023 its reverse (320540135), we get a palindrome (851585158).

The spelling of 531045023 in words is "five hundred thirty-one million, forty-five thousand, twenty-three".