531345320 has 32 divisors (see below), whose sum is σ = 1304212320. Its totient is φ = 193216320.

The previous prime is 531345289. The next prime is 531345343. The reversal of 531345320 is 23543135.

It is a self number, because there is not a number n which added to its sum of digits gives 531345320.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603362 + ... + 604241.

It is an arithmetic number, because the mean of its divisors is an integer number (40756635).

Almost surely, 2^531345320 is an apocalyptic number.

It is an amenable number.

531345320 is an abundant number, since it is smaller than the sum of its proper divisors (772867000).

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

531345320 is a wasteful number, since it uses less digits than its factorization.

531345320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207625 (or 1207621 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 531345320 is about 23050.9288316111. The cubic root of 531345320 is about 809.9513866064.

Adding to 531345320 its reverse (23543135), we get a palindrome (554888455).

The spelling of 531345320 in words is "five hundred thirty-one million, three hundred forty-five thousand, three hundred twenty".