531362321521243 has 2 divisors, whose sum is σ = 531362321521244. Its totient is φ = 531362321521242.

The previous prime is 531362321521237. The next prime is 531362321521259. The reversal of 531362321521243 is 342125123263135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531362321521243 - 2⁴⁵ = 496177949432411 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531362321521243.

It is not a weakly prime, because it can be changed into another prime (531362321521043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265681160760621 + 265681160760622.

It is an arithmetic number, because the mean of its divisors is an integer number (265681160760622).

Almost surely, 2^{531362321521243} is an apocalyptic number.

531362321521243 is a deficient number, since it is larger than the sum of its proper divisors (1).

531362321521243 is an equidigital number, since it uses as much as digits as its factorization.

531362321521243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 777600, while the sum is 43.

Adding to 531362321521243 its reverse (342125123263135), we get a palindrome (873487444784378).

The spelling of 531362321521243 in words is "five hundred thirty-one trillion, three hundred sixty-two billion, three hundred twenty-one million, five hundred twenty-one thousand, two hundred forty-three".