115244243543221 has 8 divisors (see below), whose sum is σ = 124233668001464. Its totient is φ = 106272602320320.

The previous prime is 115244243543213. The next prime is 115244243543243. The reversal of 115244243543221 is 122345342442511.

It can be written as a sum of positive squares in 4 ways, for example, as 1288917443025 + 113955326100196 = 1135305^2 + 10674986^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 115244243543221 - 2³ = 115244243543213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115244243543291) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4445795370 + ... + 4445821291.

It is an arithmetic number, because the mean of its divisors is an integer number (15529208500183).

Almost surely, 2^{115244243543221} is an apocalyptic number.

It is an amenable number.

115244243543221 is a deficient number, since it is larger than the sum of its proper divisors (8989424458243).

115244243543221 is an equidigital number, since it uses as much as digits as its factorization.

115244243543221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8891617671.

The product of its digits is 921600, while the sum is 43.

Adding to 115244243543221 its reverse (122345342442511), we get a palindrome (237589585985732).

The spelling of 115244243543221 in words is "one hundred fifteen trillion, two hundred forty-four billion, two hundred forty-three million, five hundred forty-three thousand, two hundred twenty-one".