321330 has 16 divisors (see below), whose sum is σ = 771264. Its totient is φ = 85680.

The previous prime is 321329. The next prime is 321331. The reversal of 321330 is 33123.

It is a happy number.

321330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (321329) and next prime (321331).

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (321331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5326 + ... + 5385.

It is an arithmetic number, because the mean of its divisors is an integer number (48204).

2³²¹³³⁰ is an apocalyptic number.

321330 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

321330 is an abundant number, since it is smaller than the sum of its proper divisors (449934).

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

321330 is a wasteful number, since it uses less digits than its factorization.

321330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10721.

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 321330 is about 566.8597710193. The cubic root of 321330 is about 68.4936680527.

Adding to 321330 its reverse (33123), we get a palindrome (354453).

The spelling of 321330 in words is "three hundred twenty-one thousand, three hundred thirty".