221244442430 has 32 divisors (see below), whose sum is σ = 434814887808. Its totient is φ = 80383773600.

The previous prime is 221244442429. The next prime is 221244442483. The reversal of 221244442430 is 34244442122.

221244442430 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 15 ways as a sum of consecutive naturals, for example, 729992 + ... + 987611.

It is an arithmetic number, because the mean of its divisors is an integer number (13587965244).

Almost surely, 2^221244442430 is an apocalyptic number.

221244442430 is a deficient number, since it is larger than the sum of its proper divisors (213570445378).

221244442430 is a wasteful number, since it uses less digits than its factorization.

221244442430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1718792.

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 221244442430 its reverse (34244442122), we get a palindrome (255488884552).

The spelling of 221244442430 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred forty-two thousand, four hundred thirty".