208268161 has 4 divisors (see below), whose sum is σ = 210330324. Its totient is φ = 206206000.

The previous prime is 208268143. The next prime is 208268219. The reversal of 208268161 is 161862802.

208268161 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 200760561 + 7507600 = 14169^2 + 2740^2 .

It is a cyclic number.

It is not a de Polignac number, because 208268161 - 2⁹ = 208267649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (208268131) 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, 1030930 + ... + 1031131.

It is an arithmetic number, because the mean of its divisors is an integer number (52582581).

Almost surely, 2^208268161 is an apocalyptic number.

It is an amenable number.

208268161 is a deficient number, since it is larger than the sum of its proper divisors (2062163).

208268161 is a wasteful number, since it uses less digits than its factorization.

208268161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062162.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 208268161 is about 14431.4989172989. The cubic root of 208268161 is about 592.7537280250.

The spelling of 208268161 in words is "two hundred eight million, two hundred sixty-eight thousand, one hundred sixty-one".