221330044 has 12 divisors (see below), whose sum is σ = 417122104. Its totient is φ = 102152304.

The previous prime is 221329991. The next prime is 221330047. The reversal of 221330044 is 440033122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221330047) 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, 2128122 + ... + 2128225.

Almost surely, 2^221330044 is an apocalyptic number.

It is an amenable number.

221330044 is a deficient number, since it is larger than the sum of its proper divisors (195792060).

221330044 is a wasteful number, since it uses less digits than its factorization.

221330044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256364 (or 4256362 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 221330044 is about 14877.1651869568. The cubic root of 221330044 is about 604.8951793448.

Adding to 221330044 its reverse (440033122), we get a palindrome (661363166).

The spelling of 221330044 in words is "two hundred twenty-one million, three hundred thirty thousand, forty-four".