43322161 has 2 divisors, whose sum is σ = 43322162. Its totient is φ = 43322160.

The previous prime is 43322119. The next prime is 43322173. The reversal of 43322161 is 16122334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24443136 + 18879025 = 4944^2 + 4345^2 .

It is a cyclic number.

It is not a de Polignac number, because 43322161 - 2²³ = 34933553 is a prime.

It is not a weakly prime, because it can be changed into another prime (43322761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661080 + 21661081.

It is an arithmetic number, because the mean of its divisors is an integer number (21661081).

Almost surely, 2^43322161 is an apocalyptic number.

It is an amenable number.

43322161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43322161 is an equidigital number, since it uses as much as digits as its factorization.

43322161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 43322161 is about 6581.9572317055. The cubic root of 43322161 is about 351.2125589200.

Adding to 43322161 its reverse (16122334), we get a palindrome (59444495).

The spelling of 43322161 in words is "forty-three million, three hundred twenty-two thousand, one hundred sixty-one".