221133304 has 16 divisors (see below), whose sum is σ = 473857200. Its totient is φ = 94771392.

The previous prime is 221133251. The next prime is 221133307. The reversal of 221133304 is 403331122.

221133304 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221133307) 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, 1974349 + ... + 1974460.

It is an arithmetic number, because the mean of its divisors is an integer number (29616075).

Almost surely, 2^221133304 is an apocalyptic number.

It is an amenable number.

221133304 is an abundant number, since it is smaller than the sum of its proper divisors (252723896).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221133304 is a wasteful number, since it uses less digits than its factorization.

221133304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3948822 (or 3948818 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 221133304 is about 14870.5515701335. The cubic root of 221133304 is about 604.7158960227.

Adding to 221133304 its reverse (403331122), we get a palindrome (624464426).

The spelling of 221133304 in words is "two hundred twenty-one million, one hundred thirty-three thousand, three hundred four".