204911871 has 8 divisors (see below), whose sum is σ = 277695024. Its totient is φ = 134368320.

The previous prime is 204911857. The next prime is 204911951. The reversal of 204911871 is 178119402.

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

It is not a de Polignac number, because 204911871 - 2¹³ = 204903679 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204911831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559686 + ... + 560051.

It is an arithmetic number, because the mean of its divisors is an integer number (34711878).

Almost surely, 2^204911871 is an apocalyptic number.

204911871 is a deficient number, since it is larger than the sum of its proper divisors (72783153).

204911871 is a wasteful number, since it uses less digits than its factorization.

204911871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1119801.

The product of its (nonzero) digits is 4032, while the sum is 33.

The square root of 204911871 is about 14314.7431342655. The cubic root of 204911871 is about 589.5523474044.

The spelling of 204911871 in words is "two hundred four million, nine hundred eleven thousand, eight hundred seventy-one".