328032221 has 16 divisors (see below), whose sum is σ = 380360448. Its totient is φ = 279590400.

The previous prime is 328032217. The next prime is 328032227. The reversal of 328032221 is 122230823.

It is a cyclic number.

It is not a de Polignac number, because 328032221 - 2² = 328032217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328032227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47441 + ... + 53913.

It is an arithmetic number, because the mean of its divisors is an integer number (23772528).

Almost surely, 2^328032221 is an apocalyptic number.

It is an amenable number.

328032221 is a deficient number, since it is larger than the sum of its proper divisors (52328227).

328032221 is a wasteful number, since it uses less digits than its factorization.

328032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 328032221 is about 18111.6598079801. The cubic root of 328032221 is about 689.6660296558. Note that the first 3 decimals are identical.

The spelling of 328032221 in words is "three hundred twenty-eight million, thirty-two thousand, two hundred twenty-one".