43430161 has 4 divisors (see below), whose sum is σ = 44249652. Its totient is φ = 42610672.

The previous prime is 43430147. The next prime is 43430183. The reversal of 43430161 is 16103434.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16103434 = 2 ⋅8051717.

It can be written as a sum of positive squares in 2 ways, for example, as 36978561 + 6451600 = 6081^2 + 2540^2 .

It is a cyclic number.

It is not a de Polignac number, because 43430161 - 2⁷ = 43430033 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43434161) 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 in 3 ways as a sum of consecutive naturals, for example, 409666 + ... + 409771.

It is an arithmetic number, because the mean of its divisors is an integer number (11062413).

Almost surely, 2^43430161 is an apocalyptic number.

It is an amenable number.

43430161 is a deficient number, since it is larger than the sum of its proper divisors (819491).

43430161 is an equidigital number, since it uses as much as digits as its factorization.

43430161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819490.

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

The square root of 43430161 is about 6590.1563714376. The cubic root of 43430161 is about 351.5041685648.

Adding to 43430161 its reverse (16103434), we get a palindrome (59533595).

The spelling of 43430161 in words is "forty-three million, four hundred thirty thousand, one hundred sixty-one".