531243563 has 2 divisors, whose sum is σ = 531243564. Its totient is φ = 531243562.

The previous prime is 531243487. The next prime is 531243593. The reversal of 531243563 is 365342135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531243563 - 2¹⁰ = 531242539 is a prime.

It is not a weakly prime, because it can be changed into another prime (531243593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265621781 + 265621782.

It is an arithmetic number, because the mean of its divisors is an integer number (265621782).

Almost surely, 2^531243563 is an apocalyptic number.

531243563 is a deficient number, since it is larger than the sum of its proper divisors (1).

531243563 is an equidigital number, since it uses as much as digits as its factorization.

531243563 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 32.

The square root of 531243563 is about 23048.7215046735. The cubic root of 531243563 is about 809.8996791875.

Adding to 531243563 its reverse (365342135), we get a palindrome (896585698).

The spelling of 531243563 in words is "five hundred thirty-one million, two hundred forty-three thousand, five hundred sixty-three".