43431525133 has 2 divisors, whose sum is σ = 43431525134. Its totient is φ = 43431525132.

The previous prime is 43431525103. The next prime is 43431525143. The reversal of 43431525133 is 33152513434.

43431525133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29695216329 + 13736308804 = 172323^2 + 117202^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43431525133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43431525103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715762566 + 21715762567.

It is an arithmetic number, because the mean of its divisors is an integer number (21715762567).

Almost surely, 2^43431525133 is an apocalyptic number.

It is an amenable number.

43431525133 is a deficient number, since it is larger than the sum of its proper divisors (1).

43431525133 is an equidigital number, since it uses as much as digits as its factorization.

43431525133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64800, while the sum is 34.

The spelling of 43431525133 in words is "forty-three billion, four hundred thirty-one million, five hundred twenty-five thousand, one hundred thirty-three".