321323320 has 32 divisors (see below), whose sum is σ = 723809520. Its totient is φ = 128381440.

The previous prime is 321323287. The next prime is 321323323. The reversal of 321323320 is 23323123.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321323323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34704 + ... + 42976.

Almost surely, 2^321323320 is an apocalyptic number.

It is an amenable number.

321323320 is an abundant number, since it is smaller than the sum of its proper divisors (402486200).

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

321323320 is a wasteful number, since it uses less digits than its factorization.

321323320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9255 (or 9251 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 321323320 is about 17925.4935775839. The cubic root of 321323320 is about 684.9319342033.

Adding to 321323320 its reverse (23323123), we get a palindrome (344646443).

The spelling of 321323320 in words is "three hundred twenty-one million, three hundred twenty-three thousand, three hundred twenty".