43528431409 has 2 divisors, whose sum is σ = 43528431410. Its totient is φ = 43528431408.

The previous prime is 43528431391. The next prime is 43528431421. The reversal of 43528431409 is 90413482534.

43528431409 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., 42671991184 + 856440225 = 206572^2 + 29265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43528431409 is a prime.

It is not a weakly prime, because it can be changed into another prime (43528431509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21764215704 + 21764215705.

It is an arithmetic number, because the mean of its divisors is an integer number (21764215705).

Almost surely, 2^43528431409 is an apocalyptic number.

It is an amenable number.

43528431409 is a deficient number, since it is larger than the sum of its proper divisors (1).

43528431409 is an equidigital number, since it uses as much as digits as its factorization.

43528431409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 43528431409 in words is "forty-three billion, five hundred twenty-eight million, four hundred thirty-one thousand, four hundred nine".