328716003221 has 4 divisors (see below), whose sum is σ = 331907420832. Its totient is φ = 325524585612.

The previous prime is 328716003191. The next prime is 328716003223. The reversal of 328716003221 is 122300617823.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122300617823 = 71 ⋅1722543913.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-328716003221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328716003223) 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, 1595708651 + ... + 1595708856.

It is an arithmetic number, because the mean of its divisors is an integer number (82976855208).

Almost surely, 2^328716003221 is an apocalyptic number.

It is an amenable number.

328716003221 is a deficient number, since it is larger than the sum of its proper divisors (3191417611).

328716003221 is a wasteful number, since it uses less digits than its factorization.

328716003221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191417610.

The product of its (nonzero) digits is 24192, while the sum is 35.

The spelling of 328716003221 in words is "three hundred twenty-eight billion, seven hundred sixteen million, three thousand, two hundred twenty-one".