43438161 has 48 divisors (see below), whose sum is σ = 68953920. Its totient is φ = 24105600.

The previous prime is 43438151. The next prime is 43438163. The reversal of 43438161 is 16183434.

It is not a de Polignac number, because 43438161 - 2⁹ = 43437649 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43438163) 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 47 ways as a sum of consecutive naturals, for example, 712071 + ... + 712131.

It is an arithmetic number, because the mean of its divisors is an integer number (1436540).

Almost surely, 2^43438161 is an apocalyptic number.

It is an amenable number.

43438161 is a deficient number, since it is larger than the sum of its proper divisors (25515759).

43438161 is a wasteful number, since it uses less digits than its factorization.

43438161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158 (or 127 counting only the distinct ones).

The product of its digits is 6912, while the sum is 30.

The square root of 43438161 is about 6590.7633093595. The cubic root of 43438161 is about 351.5257500390.

The spelling of 43438161 in words is "forty-three million, four hundred thirty-eight thousand, one hundred sixty-one".