531244043531 has 2 divisors, whose sum is σ = 531244043532. Its totient is φ = 531244043530.

The previous prime is 531244043483. The next prime is 531244043537. The reversal of 531244043531 is 135340442135.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-531244043531 is a prime.

It is a super-2 number, since 2×531244043531² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 531244043491 and 531244043500.

It is not a weakly prime, because it can be changed into another prime (531244043537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265622021765 + 265622021766.

It is an arithmetic number, because the mean of its divisors is an integer number (265622021766).

Almost surely, 2^531244043531 is an apocalyptic number.

531244043531 is a deficient number, since it is larger than the sum of its proper divisors (1).

531244043531 is an equidigital number, since it uses as much as digits as its factorization.

531244043531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 531244043531 its reverse (135340442135), we get a palindrome (666584485666).

The spelling of 531244043531 in words is "five hundred thirty-one billion, two hundred forty-four million, forty-three thousand, five hundred thirty-one".