531135221234207 has 2 divisors, whose sum is σ = 531135221234208. Its totient is φ = 531135221234206.

The previous prime is 531135221234201. The next prime is 531135221234347. The reversal of 531135221234207 is 702432122531135.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 531135221234207 - 2⁸ = 531135221233951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531135221234201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265567610617103 + 265567610617104.

It is an arithmetic number, because the mean of its divisors is an integer number (265567610617104).

Almost surely, 2^{531135221234207} is an apocalyptic number.

531135221234207 is a deficient number, since it is larger than the sum of its proper divisors (1).

531135221234207 is an equidigital number, since it uses as much as digits as its factorization.

531135221234207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 531135221234207 in words is "five hundred thirty-one trillion, one hundred thirty-five billion, two hundred twenty-one million, two hundred thirty-four thousand, two hundred seven".