221333324 has 12 divisors (see below), whose sum is σ = 404174064. Its totient is φ = 105855024.

The previous prime is 221333323. The next prime is 221333327. The reversal of 221333324 is 423333122.

221333324 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a self number, because there is not a number n which added to its sum of digits gives 221333324.

It is not an unprimeable number, because it can be changed into a prime (221333323) 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 3 ways as a sum of consecutive naturals, for example, 1202807 + ... + 1202990.

It is an arithmetic number, because the mean of its divisors is an integer number (33681172).

Almost surely, 2^221333324 is an apocalyptic number.

It is an amenable number.

221333324 is a deficient number, since it is larger than the sum of its proper divisors (182840740).

221333324 is a wasteful number, since it uses less digits than its factorization.

221333324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2405824 (or 2405822 counting only the distinct ones).

The product of its digits is 2592, while the sum is 23.

The square root of 221333324 is about 14877.2754226034. The cubic root of 221333324 is about 604.8981674109.

Adding to 221333324 its reverse (423333122), we get a palindrome (644666446).

The spelling of 221333324 in words is "two hundred twenty-one million, three hundred thirty-three thousand, three hundred twenty-four".