43243040045 has 4 divisors (see below), whose sum is σ = 51891648060. Its totient is φ = 34594432032.

The previous prime is 43243040039. The next prime is 43243040047. The reversal of 43243040045 is 54004034234.

43243040045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54004034234 = 2 ⋅27002017117.

It can be written as a sum of positive squares in 2 ways, for example, as 10091006116 + 33152033929 = 100454^2 + 182077^2 .

It is a cyclic number.

It is not a de Polignac number, because 43243040045 - 2²⁶ = 43175931181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43243040047) 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, 4324304000 + ... + 4324304009.

It is an arithmetic number, because the mean of its divisors is an integer number (12972912015).

Almost surely, 2^43243040045 is an apocalyptic number.

It is an amenable number.

43243040045 is a deficient number, since it is larger than the sum of its proper divisors (8648608015).

43243040045 is an equidigital number, since it uses as much as digits as its factorization.

43243040045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8648608014.

The product of its (nonzero) digits is 23040, while the sum is 29.

Adding to 43243040045 its reverse (54004034234), we get a palindrome (97247074279).

The spelling of 43243040045 in words is "forty-three billion, two hundred forty-three million, forty thousand, forty-five".