531241320403 has 2 divisors, whose sum is σ = 531241320404. Its totient is φ = 531241320402.

The previous prime is 531241320349. The next prime is 531241320413. The reversal of 531241320403 is 304023142135.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531241320403 - 2⁹ = 531241319891 is a prime.

It is not a weakly prime, because it can be changed into another prime (531241320413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265620660201 + 265620660202.

It is an arithmetic number, because the mean of its divisors is an integer number (265620660202).

Almost surely, 2^531241320403 is an apocalyptic number.

531241320403 is a deficient number, since it is larger than the sum of its proper divisors (1).

531241320403 is an equidigital number, since it uses as much as digits as its factorization.

531241320403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 531241320403 its reverse (304023142135), we get a palindrome (835264462538).

The spelling of 531241320403 in words is "five hundred thirty-one billion, two hundred forty-one million, three hundred twenty thousand, four hundred three".