221313240444 has 24 divisors (see below), whose sum is σ = 516467448448. Its totient is φ = 73761096240.

The previous prime is 221313240391. The next prime is 221313240451. The reversal of 221313240444 is 444042313122.

221313240444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1155352 + ... + 1333215.

Almost surely, 2^221313240444 is an apocalyptic number.

It is an amenable number.

221313240444 is an abundant number, since it is smaller than the sum of its proper divisors (295154208004).

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

221313240444 is a wasteful number, since it uses less digits than its factorization.

221313240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2495985 (or 2495983 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 221313240444 its reverse (444042313122), we get a palindrome (665355553566).

The spelling of 221313240444 in words is "two hundred twenty-one billion, three hundred thirteen million, two hundred forty thousand, four hundred forty-four".