204799881 has 24 divisors (see below), whose sum is σ = 323243200. Its totient is φ = 114570720.

The previous prime is 204799877. The next prime is 204799909. The reversal of 204799881 is 188997402.

It is not a de Polignac number, because 204799881 - 2² = 204799877 is a prime.

It is a super-2 number, since 2×204799881² = 83885982515228322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 204799881.

It is not an unprimeable number, because it can be changed into a prime (204799801) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16981 + ... + 26418.

Almost surely, 2^204799881 is an apocalyptic number.

It is an amenable number.

204799881 is a deficient number, since it is larger than the sum of its proper divisors (118443319).

204799881 is a wasteful number, since it uses less digits than its factorization.

204799881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43437 (or 43426 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 204799881 is about 14310.8308983092. The cubic root of 204799881 is about 589.4449256158. Note that the first 3 decimals are identical.

The spelling of 204799881 in words is "two hundred four million, seven hundred ninety-nine thousand, eight hundred eighty-one".