221344444 has 12 divisors (see below), whose sum is σ = 387543744. Its totient is φ = 110617664.

The previous prime is 221344427. The next prime is 221344451. The reversal of 221344444 is 444443122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3709 + ... + 21364.

It is an arithmetic number, because the mean of its divisors is an integer number (32295312).

Almost surely, 2^221344444 is an apocalyptic number.

It is an amenable number.

221344444 is a deficient number, since it is larger than the sum of its proper divisors (166199300).

221344444 is a wasteful number, since it uses less digits than its factorization.

221344444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27284 (or 27282 counting only the distinct ones).

The product of its digits is 12288, while the sum is 28.

The square root of 221344444 is about 14877.6491422536. The cubic root of 221344444 is about 604.9082974640.

Adding to 221344444 its reverse (444443122), we get a palindrome (665787566).

The spelling of 221344444 in words is "two hundred twenty-one million, three hundred forty-four thousand, four hundred forty-four".