43123352161 has 2 divisors, whose sum is σ = 43123352162. Its totient is φ = 43123352160.

The previous prime is 43123352159. The next prime is 43123352171. The reversal of 43123352161 is 16125332134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42619125136 + 504227025 = 206444^2 + 22455^2 .

It is a cyclic number.

It is not a de Polignac number, because 43123352161 - 2¹ = 43123352159 is a prime.

Together with 43123352159, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43123352171) 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, 21561676080 + 21561676081.

It is an arithmetic number, because the mean of its divisors is an integer number (21561676081).

Almost surely, 2^43123352161 is an apocalyptic number.

It is an amenable number.

43123352161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43123352161 is an equidigital number, since it uses as much as digits as its factorization.

43123352161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 31.

Adding to 43123352161 its reverse (16125332134), we get a palindrome (59248684295).

The spelling of 43123352161 in words is "forty-three billion, one hundred twenty-three million, three hundred fifty-two thousand, one hundred sixty-one".