321311320 has 32 divisors (see below), whose sum is σ = 788674320. Its totient is φ = 116840320.

The previous prime is 321311303. The next prime is 321311321. The reversal of 321311320 is 23113123.

It is a junction number, because it is equal to n+sod(n) for n = 321311294 and 321311303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321311321) 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 7 ways as a sum of consecutive naturals, for example, 364687 + ... + 365566.

Almost surely, 2^321311320 is an apocalyptic number.

It is an amenable number.

321311320 is an abundant number, since it is smaller than the sum of its proper divisors (467363000).

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

321311320 is a wasteful number, since it uses less digits than its factorization.

321311320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 730275 (or 730271 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 321311320 is about 17925.1588556420. The cubic root of 321311320 is about 684.9234077078.

Adding to 321311320 its reverse (23113123), we get a palindrome (344424443).

The spelling of 321311320 in words is "three hundred twenty-one million, three hundred eleven thousand, three hundred twenty".