43016535509 has 2 divisors, whose sum is σ = 43016535510. Its totient is φ = 43016535508.

The previous prime is 43016535491. The next prime is 43016535547. The reversal of 43016535509 is 90553561034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36139150609 + 6877384900 = 190103^2 + 82930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43016535509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43016535559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21508267754 + 21508267755.

It is an arithmetic number, because the mean of its divisors is an integer number (21508267755).

Almost surely, 2^43016535509 is an apocalyptic number.

It is an amenable number.

43016535509 is a deficient number, since it is larger than the sum of its proper divisors (1).

43016535509 is an equidigital number, since it uses as much as digits as its factorization.

43016535509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243000, while the sum is 41.

The spelling of 43016535509 in words is "forty-three billion, sixteen million, five hundred thirty-five thousand, five hundred nine".