43065161 has 2 divisors, whose sum is σ = 43065162. Its totient is φ = 43065160.

The previous prime is 43065133. The next prime is 43065163. The reversal of 43065161 is 16156034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27510025 + 15555136 = 5245^2 + 3944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43065161 is a prime.

Together with 43065163, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43065161.

It is not a weakly prime, because it can be changed into another prime (43065163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21532580 + 21532581.

It is an arithmetic number, because the mean of its divisors is an integer number (21532581).

Almost surely, 2^43065161 is an apocalyptic number.

It is an amenable number.

43065161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43065161 is an equidigital number, since it uses as much as digits as its factorization.

43065161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 43065161 is about 6562.4051231237. The cubic root of 43065161 is about 350.5166817796.

The spelling of 43065161 in words is "forty-three million, sixty-five thousand, one hundred sixty-one".