531362321521231 has 2 divisors, whose sum is σ = 531362321521232. Its totient is φ = 531362321521230.

The previous prime is 531362321521153. The next prime is 531362321521237. The reversal of 531362321521231 is 132125123263135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531362321521231 - 2¹³ = 531362321513039 is a prime.

It is a super-2 number, since 2×531362321521231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531362321521237) 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, 265681160760615 + 265681160760616.

It is an arithmetic number, because the mean of its divisors is an integer number (265681160760616).

Almost surely, 2^{531362321521231} is an apocalyptic number.

531362321521231 is a deficient number, since it is larger than the sum of its proper divisors (1).

531362321521231 is an equidigital number, since it uses as much as digits as its factorization.

531362321521231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

Adding to 531362321521231 its reverse (132125123263135), we get a palindrome (663487444784366).

The spelling of 531362321521231 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 thirty-one".