204661271 has 4 divisors (see below), whose sum is σ = 207252000. Its totient is φ = 202070544.

The previous prime is 204661241. The next prime is 204661277. The reversal of 204661271 is 172166402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204661271 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204661277) 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, 1295246 + ... + 1295403.

It is an arithmetic number, because the mean of its divisors is an integer number (51813000).

Almost surely, 2^204661271 is an apocalyptic number.

204661271 is a deficient number, since it is larger than the sum of its proper divisors (2590729).

204661271 is an equidigital number, since it uses as much as digits as its factorization.

204661271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590728.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 204661271 is about 14305.9872431091. The cubic root of 204661271 is about 589.3119154467.

The spelling of 204661271 in words is "two hundred four million, six hundred sixty-one thousand, two hundred seventy-one".