221431044206 has 16 divisors (see below), whose sum is σ = 332415619200. Its totient is φ = 110625878880.

The previous prime is 221431044199. The next prime is 221431044223. The reversal of 221431044206 is 602440134122.

221431044206 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, 14679140 + ... + 14694216.

It is an arithmetic number, because the mean of its divisors is an integer number (20775976200).

Almost surely, 2^221431044206 is an apocalyptic number.

221431044206 is a deficient number, since it is larger than the sum of its proper divisors (110984574994).

221431044206 is a wasteful number, since it uses less digits than its factorization.

221431044206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20539.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 221431044206 its reverse (602440134122), we get a palindrome (823871178328).

The spelling of 221431044206 in words is "two hundred twenty-one billion, four hundred thirty-one million, forty-four thousand, two hundred six".