203102161 has 4 divisors (see below), whose sum is σ = 203989300. Its totient is φ = 202215024.

The previous prime is 203102147. The next prime is 203102177. The reversal of 203102161 is 161201302.

203102161 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 159542161 + 43560000 = 12631^2 + 6600^2 .

It is a cyclic number.

It is not a de Polignac number, because 203102161 - 2⁵ = 203102129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (203102261) 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, 443226 + ... + 443683.

It is an arithmetic number, because the mean of its divisors is an integer number (50997325).

Almost surely, 2^203102161 is an apocalyptic number.

It is an amenable number.

203102161 is a deficient number, since it is larger than the sum of its proper divisors (887139).

203102161 is an equidigital number, since it uses as much as digits as its factorization.

203102161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887138.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 203102161 is about 14251.3915460912. The cubic root of 203102161 is about 587.8116394601.

Adding to 203102161 its reverse (161201302), we get a palindrome (364303463).

The spelling of 203102161 in words is "two hundred three million, one hundred two thousand, one hundred sixty-one".