321663441 has 64 divisors (see below), whose sum is σ = 509607936. Its totient is φ = 178516800.

The previous prime is 321663439. The next prime is 321663493. The reversal of 321663441 is 144366123.

It is not a de Polignac number, because 321663441 - 2¹ = 321663439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 321663399 and 321663408.

It is not an unprimeable number, because it can be changed into a prime (321663421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2532720 + ... + 2532846.

It is an arithmetic number, because the mean of its divisors is an integer number (7962624).

Almost surely, 2^321663441 is an apocalyptic number.

It is an amenable number.

321663441 is a deficient number, since it is larger than the sum of its proper divisors (187944495).

321663441 is a wasteful number, since it uses less digits than its factorization.

321663441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282.

The product of its digits is 10368, while the sum is 30.

The square root of 321663441 is about 17934.9781432819. The cubic root of 321663441 is about 685.1735159914.

The spelling of 321663441 in words is "three hundred twenty-one million, six hundred sixty-three thousand, four hundred forty-one".