43043161 has 4 divisors (see below), whose sum is σ = 49192192. Its totient is φ = 36894132.

The previous prime is 43043149. The next prime is 43043171. The reversal of 43043161 is 16134034.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43043161 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43043101) 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, 3074505 + ... + 3074518.

It is an arithmetic number, because the mean of its divisors is an integer number (12298048).

Almost surely, 2^43043161 is an apocalyptic number.

It is an amenable number.

43043161 is a deficient number, since it is larger than the sum of its proper divisors (6149031).

43043161 is an equidigital number, since it uses as much as digits as its factorization.

43043161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6149030.

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

The square root of 43043161 is about 6560.7286942839. The cubic root of 43043161 is about 350.4569840230.

Adding to 43043161 its reverse (16134034), we get a palindrome (59177195).

The spelling of 43043161 in words is "forty-three million, forty-three thousand, one hundred sixty-one".