443540161 has 4 divisors (see below), whose sum is σ = 466884400. Its totient is φ = 420195924.

The previous prime is 443540159. The next prime is 443540179. The reversal of 443540161 is 161045344.

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 not a de Polignac number, because 443540161 - 2¹ = 443540159 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (443540101) 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, 11672091 + ... + 11672128.

It is an arithmetic number, because the mean of its divisors is an integer number (116721100).

Almost surely, 2^443540161 is an apocalyptic number.

It is an amenable number.

443540161 is a deficient number, since it is larger than the sum of its proper divisors (23344239).

443540161 is a wasteful number, since it uses less digits than its factorization.

443540161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23344238.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 443540161 is about 21060.3931824646. The cubic root of 443540161 is about 762.6249038779.

The spelling of 443540161 in words is "four hundred forty-three million, five hundred forty thousand, one hundred sixty-one".