43544020243 has 4 divisors (see below), whose sum is σ = 43617450888. Its totient is φ = 43470589600.

The previous prime is 43544020229. The next prime is 43544020253. The reversal of 43544020243 is 34202044534.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 43544020243 - 2³³ = 34954085651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43544020253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36714433 + ... + 36715618.

It is an arithmetic number, because the mean of its divisors is an integer number (10904362722).

Almost surely, 2^43544020243 is an apocalyptic number.

43544020243 is a deficient number, since it is larger than the sum of its proper divisors (73430645).

43544020243 is an equidigital number, since it uses as much as digits as its factorization.

43544020243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73430644.

The product of its (nonzero) digits is 46080, while the sum is 31.

Adding to 43544020243 its reverse (34202044534), we get a palindrome (77746064777).

The spelling of 43544020243 in words is "forty-three billion, five hundred forty-four million, twenty thousand, two hundred forty-three".