221244440324 has 6 divisors (see below), whose sum is σ = 387177770574. Its totient is φ = 110622220160.

The previous prime is 221244440323. The next prime is 221244440363. The reversal of 221244440324 is 423044442122.

It can be written as a sum of positive squares in only one way, i.e., 188399402500 + 32845037824 = 434050^2 + 181232^2 .

It is not an unprimeable number, because it can be changed into a prime (221244440323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27655555037 + ... + 27655555044.

It is an arithmetic number, because the mean of its divisors is an integer number (64529628429).

Almost surely, 2^221244440324 is an apocalyptic number.

It is an amenable number.

221244440324 is a deficient number, since it is larger than the sum of its proper divisors (165933330250).

221244440324 is a wasteful number, since it uses less digits than its factorization.

221244440324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55311110085 (or 55311110083 counting only the distinct ones).

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

Adding to 221244440324 its reverse (423044442122), we get a palindrome (644288882446).

The spelling of 221244440324 in words is "two hundred twenty-one billion, two hundred forty-four million, four hundred forty thousand, three hundred twenty-four".