213330321 has 16 divisors (see below), whose sum is σ = 322771200. Its totient is φ = 139193424.

The previous prime is 213330317. The next prime is 213330329. The reversal of 213330321 is 123033312.

213330321 is a `hidden beast` number, since 2 + 13 + 330 + 321 = 666.

213330321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 213330321 - 2² = 213330317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213330294 and 213330303.

It is not an unprimeable number, because it can be changed into a prime (213330329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82786 + ... + 85323.

It is an arithmetic number, because the mean of its divisors is an integer number (20173200).

Almost surely, 2^213330321 is an apocalyptic number.

It is an amenable number.

213330321 is a deficient number, since it is larger than the sum of its proper divisors (109440879).

213330321 is a wasteful number, since it uses less digits than its factorization.

213330321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168165 (or 168159 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 213330321 is about 14605.8317462581. The cubic root of 213330321 is about 597.5178204684.

Adding to 213330321 its reverse (123033312), we get a palindrome (336363633).

The spelling of 213330321 in words is "two hundred thirteen million, three hundred thirty thousand, three hundred twenty-one".