321232320 has 84 divisors (see below), whose sum is σ = 1104915240. Its totient is φ = 85661184.

The previous prime is 321232313. The next prime is 321232321. The reversal of 321232320 is 23232123.

It is a happy number.

321232320 is a `hidden beast` number, since 321 + 2 + 323 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 321232293 and 321232302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321232321) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 52890 + ... + 58649.

Almost surely, 2^321232320 is an apocalyptic number.

321232320 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321232320 is an abundant number, since it is smaller than the sum of its proper divisors (783682920).

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

321232320 is a wasteful number, since it uses less digits than its factorization.

321232320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111562 (or 111549 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 321232320 is about 17922.9551134851. The cubic root of 321232320 is about 684.8672696458.

Adding to 321232320 its reverse (23232123), we get a palindrome (344464443).

It can be divided in two parts, 32123 and 2320, that added together give a palindrome (34443).

The spelling of 321232320 in words is "three hundred twenty-one million, two hundred thirty-two thousand, three hundred twenty".