243305554441 has 4 divisors (see below), whose sum is σ = 253884056832. Its totient is φ = 232727052052.

The previous prime is 243305554439. The next prime is 243305554469. The reversal of 243305554441 is 144455503342.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144455503342 = 2 ⋅72227751671.

It is a cyclic number.

It is not a de Polignac number, because 243305554441 - 2¹ = 243305554439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243305554394 and 243305554403.

It is not an unprimeable number, because it can be changed into a prime (243305557441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5289251161 + ... + 5289251206.

It is an arithmetic number, because the mean of its divisors is an integer number (63471014208).

Almost surely, 2^243305554441 is an apocalyptic number.

It is an amenable number.

243305554441 is a deficient number, since it is larger than the sum of its proper divisors (10578502391).

243305554441 is a wasteful number, since it uses less digits than its factorization.

243305554441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10578502390.

The product of its (nonzero) digits is 576000, while the sum is 40.

The spelling of 243305554441 in words is "two hundred forty-three billion, three hundred five million, five hundred fifty-four thousand, four hundred forty-one".