43636161 has 16 divisors (see below), whose sum is σ = 61776000. Its totient is φ = 27303168.

The previous prime is 43636157. The next prime is 43636181. The reversal of 43636161 is 16163634.

43636161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 43636161 - 2² = 43636157 is a prime.

It is a super-2 number, since 2×43636161² = 3808229093635842, which contains 22 as substring.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43636121) 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 in 15 ways as a sum of consecutive naturals, for example, 21415 + ... + 23363.

It is an arithmetic number, because the mean of its divisors is an integer number (3861000).

Almost surely, 2^43636161 is an apocalyptic number.

It is an amenable number.

43636161 is a deficient number, since it is larger than the sum of its proper divisors (18139839).

43636161 is a wasteful number, since it uses less digits than its factorization.

43636161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2408.

The product of its digits is 7776, while the sum is 30.

The square root of 43636161 is about 6605.7672529389. The cubic root of 43636161 is about 352.0590492578.

Adding to 43636161 its reverse (16163634), we get a palindrome (59799795).

The spelling of 43636161 in words is "forty-three million, six hundred thirty-six thousand, one hundred sixty-one".