43240204091 has 4 divisors (see below), whose sum is σ = 49417376112. Its totient is φ = 37063032072.

The previous prime is 43240204087. The next prime is 43240204103. The reversal of 43240204091 is 19040204234.

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 43240204091 - 2² = 43240204087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43240204001) 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, 3088586000 + ... + 3088586013.

It is an arithmetic number, because the mean of its divisors is an integer number (12354344028).

Almost surely, 2^43240204091 is an apocalyptic number.

43240204091 is a deficient number, since it is larger than the sum of its proper divisors (6177172021).

43240204091 is an equidigital number, since it uses as much as digits as its factorization.

43240204091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6177172020.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 43240204091 in words is "forty-three billion, two hundred forty million, two hundred four thousand, ninety-one".