43623161 has 4 divisors (see below), whose sum is σ = 43875492. Its totient is φ = 43370832.

The previous prime is 43623149. The next prime is 43623179. The reversal of 43623161 is 16132634.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 41538025 + 2085136 = 6445^2 + 1444^2 .

It is a cyclic number.

It is not a de Polignac number, because 43623161 - 2¹⁴ = 43606777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43623161.

It is not an unprimeable number, because it can be changed into a prime (43623061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125906 + ... + 126251.

It is an arithmetic number, because the mean of its divisors is an integer number (10968873).

Almost surely, 2^43623161 is an apocalyptic number.

It is an amenable number.

43623161 is a deficient number, since it is larger than the sum of its proper divisors (252331).

43623161 is a wasteful number, since it uses less digits than its factorization.

43623161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252330.

The product of its digits is 2592, while the sum is 26.

The square root of 43623161 is about 6604.7831909912. The cubic root of 43623161 is about 352.0240842035.

Adding to 43623161 its reverse (16132634), we get a palindrome (59755795).

The spelling of 43623161 in words is "forty-three million, six hundred twenty-three thousand, one hundred sixty-one".