43041052391 has 4 divisors (see below), whose sum is σ = 43048176192. Its totient is φ = 43033928592.

The previous prime is 43041052381. The next prime is 43041052429. The reversal of 43041052391 is 19325014034.

43041052391 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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43041052391 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 (43041052321) 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, 3552830 + ... + 3564923.

It is an arithmetic number, because the mean of its divisors is an integer number (10762044048).

Almost surely, 2^43041052391 is an apocalyptic number.

43041052391 is a deficient number, since it is larger than the sum of its proper divisors (7123801).

43041052391 is an equidigital number, since it uses as much as digits as its factorization.

43041052391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7123800.

The product of its (nonzero) digits is 12960, while the sum is 32.

The spelling of 43041052391 in words is "forty-three billion, forty-one million, fifty-two thousand, three hundred ninety-one".