221044044 has 24 divisors (see below), whose sum is σ = 555444400. Its totient is φ = 68013504.

The previous prime is 221044027. The next prime is 221044051. The reversal of 221044044 is 440440122.

It is a self number, because there is not a number n which added to its sum of digits gives 221044044.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 708319 + ... + 708630.

Almost surely, 2^221044044 is an apocalyptic number.

It is an amenable number.

221044044 is an abundant number, since it is smaller than the sum of its proper divisors (334400356).

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

221044044 is a wasteful number, since it uses less digits than its factorization.

221044044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416969 (or 1416967 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 221044044 is about 14867.5500335462. The cubic root of 221044044 is about 604.6345209665.

Adding to 221044044 its reverse (440440122), we get a palindrome (661484166).

The spelling of 221044044 in words is "two hundred twenty-one million, forty-four thousand, forty-four".