16208161 has 4 divisors (see below), whose sum is σ = 16603524. Its totient is φ = 15812800.

The previous prime is 16208141. The next prime is 16208167. The reversal of 16208161 is 16180261.

16208161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 4264225 + 11943936 = 2065^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 16208161 - 2⁹ = 16207649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16208167) 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, 197620 + ... + 197701.

It is an arithmetic number, because the mean of its divisors is an integer number (4150881).

Almost surely, 2^16208161 is an apocalyptic number.

It is an amenable number.

16208161 is a deficient number, since it is larger than the sum of its proper divisors (395363).

16208161 is an equidigital number, since it uses as much as digits as its factorization.

16208161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395362.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 16208161 is about 4025.9360402272. The cubic root of 16208161 is about 253.0722816798.

The spelling of 16208161 in words is "sixteen million, two hundred eight thousand, one hundred sixty-one".