204640271 has 8 divisors (see below), whose sum is σ = 236376144. Its totient is φ = 175093120.

The previous prime is 204640253. The next prime is 204640313. The reversal of 204640271 is 172046402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204640271 - 2²² = 200445967 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204640271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204640231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 546980 + ... + 547353.

It is an arithmetic number, because the mean of its divisors is an integer number (29547018).

Almost surely, 2^204640271 is an apocalyptic number.

204640271 is a deficient number, since it is larger than the sum of its proper divisors (31735873).

204640271 is a wasteful number, since it uses less digits than its factorization.

204640271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094361.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 204640271 is about 14305.2532658461. The cubic root of 204640271 is about 589.2917586066.

Adding to 204640271 its reverse (172046402), we get a palindrome (376686673).

The spelling of 204640271 in words is "two hundred four million, six hundred forty thousand, two hundred seventy-one".