531421325551 has 2 divisors, whose sum is σ = 531421325552. Its totient is φ = 531421325550.

The previous prime is 531421325527. The next prime is 531421325579. The reversal of 531421325551 is 155523124135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531421325551 - 2⁷ = 531421325423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531421325551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531421325051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265710662775 + 265710662776.

It is an arithmetic number, because the mean of its divisors is an integer number (265710662776).

Almost surely, 2^531421325551 is an apocalyptic number.

531421325551 is a deficient number, since it is larger than the sum of its proper divisors (1).

531421325551 is an equidigital number, since it uses as much as digits as its factorization.

531421325551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 37.

Adding to 531421325551 its reverse (155523124135), we get a palindrome (686944449686).

The spelling of 531421325551 in words is "five hundred thirty-one billion, four hundred twenty-one million, three hundred twenty-five thousand, five hundred fifty-one".