321444220 has 12 divisors (see below), whose sum is σ = 675032904. Its totient is φ = 128577680.

The previous prime is 321444209. The next prime is 321444229. The reversal of 321444220 is 22444123.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 321444191 and 321444200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321444229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8036086 + ... + 8036125.

It is an arithmetic number, because the mean of its divisors is an integer number (56252742).

Almost surely, 2^321444220 is an apocalyptic number.

It is an amenable number.

321444220 is an abundant number, since it is smaller than the sum of its proper divisors (353588684).

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

321444220 is a wasteful number, since it uses less digits than its factorization.

321444220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16072220 (or 16072218 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 321444220 is about 17928.8655525106. The cubic root of 321444220 is about 685.0178268044.

Adding to 321444220 its reverse (22444123), we get a palindrome (343888343).

The spelling of 321444220 in words is "three hundred twenty-one million, four hundred forty-four thousand, two hundred twenty".