531323122320 has 200 divisors, whose sum is σ = 1875617181240. Its totient is φ = 139363338240.

The previous prime is 531323122261. The next prime is 531323122327. The reversal of 531323122320 is 23221323135.

It is a happy number.

531323122320 is a `hidden beast` number, since 5 + 3 + 1 + 323 + 12 + 2 + 320 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 32231739024 + 499091383296 = 179532^2 + 706464^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

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 39 ways as a sum of consecutive naturals, for example, 276805 + ... + 1067364.

Almost surely, 2^531323122320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 531323122320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (937808590620).

531323122320 is an abundant number, since it is smaller than the sum of its proper divisors (1344294058920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

531323122320 is a wasteful number, since it uses less digits than its factorization.

531323122320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1344255 (or 1344240 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

Adding to 531323122320 its reverse (23221323135), we get a palindrome (554544445455).

The spelling of 531323122320 in words is "five hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, three hundred twenty".