531323122321 has 8 divisors (see below), whose sum is σ = 592186762080. Its totient is φ = 473749409088.

The previous prime is 531323122261. The next prime is 531323122327. The reversal of 531323122321 is 123221323135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531323122321 - 2⁷ = 531323122193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531323122321.

It is not an unprimeable number, because it can be changed into a prime (531323122327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 822481291 + ... + 822481936.

It is an arithmetic number, because the mean of its divisors is an integer number (74023345260).

Almost surely, 2^531323122321 is an apocalyptic number.

It is an amenable number.

531323122321 is a deficient number, since it is larger than the sum of its proper divisors (60863639759).

531323122321 is a wasteful number, since it uses less digits than its factorization.

531323122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644963263.

The product of its digits is 6480, while the sum is 28.

Adding to 531323122321 its reverse (123221323135), we get a palindrome (654544445456).

The spelling of 531323122321 in words is "five hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, three hundred twenty-one".