320531232 has 48 divisors (see below), whose sum is σ = 961595712. Its totient is φ = 91580160.

The previous prime is 320531221. The next prime is 320531249. The reversal of 320531232 is 232135023.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 320531199 and 320531208.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237819 + ... + 239162.

It is an arithmetic number, because the mean of its divisors is an integer number (20033244).

Almost surely, 2^320531232 is an apocalyptic number.

320531232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320531232 is an abundant number, since it is smaller than the sum of its proper divisors (641064480).

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

320531232 is a wasteful number, since it uses less digits than its factorization.

320531232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477001 (or 476993 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 320531232 is about 17903.3860484546. The cubic root of 320531232 is about 684.3686668916.

Adding to 320531232 its reverse (232135023), we get a palindrome (552666255).

The spelling of 320531232 in words is "three hundred twenty million, five hundred thirty-one thousand, two hundred thirty-two".