531040450443 has 12 divisors (see below), whose sum is σ = 715428749880. Its totient is φ = 350377185792.

The previous prime is 531040450399. The next prime is 531040450471. The reversal of 531040450443 is 344054040135.

It is a happy number.

It is not a de Polignac number, because 531040450443 - 2³⁰ = 529966708619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (531040451443) 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 in 11 ways as a sum of consecutive naturals, for example, 9378378 + ... + 9434831.

It is an arithmetic number, because the mean of its divisors is an integer number (59619062490).

Almost surely, 2^531040450443 is an apocalyptic number.

531040450443 is a deficient number, since it is larger than the sum of its proper divisors (184388299437).

531040450443 is an equidigital number, since it uses as much as digits as its factorization.

531040450443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18813406 (or 18813309 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 33.

Adding to 531040450443 its reverse (344054040135), we get a palindrome (875094490578).

The spelling of 531040450443 in words is "five hundred thirty-one billion, forty million, four hundred fifty thousand, four hundred forty-three".