43204161 has 32 divisors (see below), whose sum is σ = 77349888. Its totient is φ = 20715840.

The previous prime is 43204153. The next prime is 43204181. The reversal of 43204161 is 16140234.

It is not a de Polignac number, because 43204161 - 2³ = 43204153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (43204151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4191 + ... + 10196.

It is an arithmetic number, because the mean of its divisors is an integer number (2417184).

Almost surely, 2^43204161 is an apocalyptic number.

It is an amenable number.

43204161 is a deficient number, since it is larger than the sum of its proper divisors (34145727).

43204161 is a wasteful number, since it uses less digits than its factorization.

43204161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14421.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 43204161 is about 6572.9872204349. The cubic root of 43204161 is about 350.8933938144.

Adding to 43204161 its reverse (16140234), we get a palindrome (59344395).

It can be divided in two parts, 43204 and 161, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 43204161 in words is "forty-three million, two hundred four thousand, one hundred sixty-one".