328643215 has 4 divisors (see below), whose sum is σ = 394371864. Its totient is φ = 262914568.

The previous prime is 328643207. The next prime is 328643219. The reversal of 328643215 is 512346823.

328643215 is nontrivially palindromic in base 9.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 512346823 = 103 ⋅4974241.

It is a cyclic number.

It is not a de Polignac number, because 328643215 - 2³ = 328643207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328643219) 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, 32864317 + ... + 32864326.

It is an arithmetic number, because the mean of its divisors is an integer number (98592966).

Almost surely, 2^328643215 is an apocalyptic number.

328643215 is a deficient number, since it is larger than the sum of its proper divisors (65728649).

328643215 is an equidigital number, since it uses as much as digits as its factorization.

328643215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65728648.

The product of its digits is 34560, while the sum is 34.

The square root of 328643215 is about 18128.5193824537. The cubic root of 328643215 is about 690.0939555597.

The spelling of 328643215 in words is "three hundred twenty-eight million, six hundred forty-three thousand, two hundred fifteen".