321443332 has 18 divisors (see below), whose sum is σ = 654367182. Its totient is φ = 137761344.

The previous prime is 321443329. The next prime is 321443333. The reversal of 321443332 is 233344123.

It can be written as a sum of positive squares in only one way, i.e., 238887936 + 82555396 = 15456^2 + 9086^2 .

It is a junction number, because it is equal to n+sod(n) for n = 321443297 and 321443306.

It is not an unprimeable number, because it can be changed into a prime (321443333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 819813 + ... + 820204.

Almost surely, 2^321443332 is an apocalyptic number.

It is an amenable number.

321443332 is an abundant number, since it is smaller than the sum of its proper divisors (332923850).

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

321443332 is a wasteful number, since it uses less digits than its factorization.

321443332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640035 (or 1640026 counting only the distinct ones).

The product of its digits is 5184, while the sum is 25.

The square root of 321443332 is about 17928.8407879595. The cubic root of 321443332 is about 685.0171960093.

Adding to 321443332 its reverse (233344123), we get a palindrome (554787455).

The spelling of 321443332 in words is "three hundred twenty-one million, four hundred forty-three thousand, three hundred thirty-two".