321230320 has 20 divisors (see below), whose sum is σ = 746860680. Its totient is φ = 128492096.

The previous prime is 321230311. The next prime is 321230363. The reversal of 321230320 is 23032123.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 321230294 and 321230303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2007610 + ... + 2007769.

It is an arithmetic number, because the mean of its divisors is an integer number (37343034).

Almost surely, 2^321230320 is an apocalyptic number.

It is an amenable number.

321230320 is an abundant number, since it is smaller than the sum of its proper divisors (425630360).

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

321230320 is a wasteful number, since it uses less digits than its factorization.

321230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4015392 (or 4015386 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 16.

The square root of 321230320 is about 17922.8993190276. The cubic root of 321230320 is about 684.8658483096.

Adding to 321230320 its reverse (23032123), we get a palindrome (344262443).

The spelling of 321230320 in words is "three hundred twenty-one million, two hundred thirty thousand, three hundred twenty".