243221312104 has 8 divisors (see below), whose sum is σ = 456039960210. Its totient is φ = 121610656048.

The previous prime is 243221312083. The next prime is 243221312137. The reversal of 243221312104 is 401213122342.

It can be written as a sum of positive squares in only one way, i.e., 213626991204 + 29594320900 = 462198^2 + 172030^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

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, 15201331999 + ... + 15201332014.

Almost surely, 2^243221312104 is an apocalyptic number.

It is an amenable number.

243221312104 is a deficient number, since it is larger than the sum of its proper divisors (212818648106).

243221312104 is a wasteful number, since it uses less digits than its factorization.

243221312104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30402664019 (or 30402664015 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 243221312104 its reverse (401213122342), we get a palindrome (644434434446).

The spelling of 243221312104 in words is "two hundred forty-three billion, two hundred twenty-one million, three hundred twelve thousand, one hundred four".