531533324313421 has 16 divisors (see below), whose sum is σ = 577070760764160. Its totient is φ = 487964246068800.

The previous prime is 531533324313403. The next prime is 531533324313427. The reversal of 531533324313421 is 124313423335135.

It is a cyclic number.

It is not a de Polignac number, because 531533324313421 - 2⁴³ = 522737231291213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531533324313427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2946553806 + ... + 2946734191.

It is an arithmetic number, because the mean of its divisors is an integer number (36066922547760).

Almost surely, 2^{531533324313421} is an apocalyptic number.

It is an amenable number.

531533324313421 is a deficient number, since it is larger than the sum of its proper divisors (45537436450739).

531533324313421 is a wasteful number, since it uses less digits than its factorization.

531533324313421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5893288164.

The product of its digits is 1166400, while the sum is 43.

Adding to 531533324313421 its reverse (124313423335135), we get a palindrome (655846747648556).

The spelling of 531533324313421 in words is "five hundred thirty-one trillion, five hundred thirty-three billion, three hundred twenty-four million, three hundred thirteen thousand, four hundred twenty-one".