221024444 has 12 divisors (see below), whose sum is σ = 387181704. Its totient is φ = 110401104.

The previous prime is 221024431. The next prime is 221024449. The reversal of 221024444 is 444420122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221024449) 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, 23222 + ... + 31325.

It is an arithmetic number, because the mean of its divisors is an integer number (32265142).

Almost surely, 2^221024444 is an apocalyptic number.

It is an amenable number.

221024444 is a deficient number, since it is larger than the sum of its proper divisors (166157260).

221024444 is a wasteful number, since it uses less digits than its factorization.

221024444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55564 (or 55562 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 221024444 is about 14866.8908652751. The cubic root of 221024444 is about 604.6166494349.

Adding to 221024444 its reverse (444420122), we get a palindrome (665444566).

The spelling of 221024444 in words is "two hundred twenty-one million, twenty-four thousand, four hundred forty-four".