204053161 has 4 divisors (see below), whose sum is σ = 219749572. Its totient is φ = 188356752.

The previous prime is 204053149. The next prime is 204053183. The reversal of 204053161 is 161350402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161350402 = 2 ⋅80675201.

It can be written as a sum of positive squares in 2 ways, for example, as 103652761 + 100400400 = 10181^2 + 10020^2 .

It is a cyclic number.

It is not a de Polignac number, because 204053161 - 2²⁷ = 69835433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204053561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7848186 + ... + 7848211.

It is an arithmetic number, because the mean of its divisors is an integer number (54937393).

Almost surely, 2^204053161 is an apocalyptic number.

It is an amenable number.

204053161 is a deficient number, since it is larger than the sum of its proper divisors (15696411).

204053161 is a wasteful number, since it uses less digits than its factorization.

204053161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15696410.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 204053161 is about 14284.7177430987. The cubic root of 204053161 is about 588.7276622686.

The spelling of 204053161 in words is "two hundred four million, fifty-three thousand, one hundred sixty-one".