531243503111 has 2 divisors, whose sum is σ = 531243503112. Its totient is φ = 531243503110.

The previous prime is 531243503101. The next prime is 531243503113. The reversal of 531243503111 is 111305342135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531243503111 - 2⁶ = 531243503047 is a prime.

It is a Sophie Germain prime.

Together with 531243503113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531243503113) 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, 265621751555 + 265621751556.

It is an arithmetic number, because the mean of its divisors is an integer number (265621751556).

Almost surely, 2^531243503111 is an apocalyptic number.

531243503111 is a deficient number, since it is larger than the sum of its proper divisors (1).

531243503111 is an equidigital number, since it uses as much as digits as its factorization.

531243503111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

Adding to 531243503111 its reverse (111305342135), we get a palindrome (642548845246).

The spelling of 531243503111 in words is "five hundred thirty-one billion, two hundred forty-three million, five hundred three thousand, one hundred eleven".