43331457161 has 2 divisors, whose sum is σ = 43331457162. Its totient is φ = 43331457160.

The previous prime is 43331457157. The next prime is 43331457163. The reversal of 43331457161 is 16175413334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28900000000 + 14431457161 = 170000^2 + 120131^2 .

It is a cyclic number.

It is not a de Polignac number, because 43331457161 - 2² = 43331457157 is a prime.

Together with 43331457163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43331457163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21665728580 + 21665728581.

It is an arithmetic number, because the mean of its divisors is an integer number (21665728581).

Almost surely, 2^43331457161 is an apocalyptic number.

It is an amenable number.

43331457161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43331457161 is an equidigital number, since it uses as much as digits as its factorization.

43331457161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The spelling of 43331457161 in words is "forty-three billion, three hundred thirty-one million, four hundred fifty-seven thousand, one hundred sixty-one".