321320412 has 48 divisors (see below), whose sum is σ = 952062720. Its totient is φ = 91805616.

The previous prime is 321320399. The next prime is 321320423. The reversal of 321320412 is 214023123.

321320412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211758 + ... + 213269.

It is an arithmetic number, because the mean of its divisors is an integer number (19834640).

Almost surely, 2^321320412 is an apocalyptic number.

It is an amenable number.

321320412 is an abundant number, since it is smaller than the sum of its proper divisors (630742308).

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

321320412 is a wasteful number, since it uses less digits than its factorization.

321320412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425047 (or 425039 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 321320412 is about 17925.4124638737. The cubic root of 321320412 is about 684.9298679687.

Adding to 321320412 its reverse (214023123), we get a palindrome (535343535).

The spelling of 321320412 in words is "three hundred twenty-one million, three hundred twenty thousand, four hundred twelve".