204201999 has 16 divisors (see below), whose sum is σ = 304384000. Its totient is φ = 135296568.

The previous prime is 204201989. The next prime is 204202039. The reversal of 204201999 is 999102402.

It is not a de Polignac number, because 204201999 - 2⁷ = 204201871 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 (204201919) 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 15 ways as a sum of consecutive naturals, for example, 18799 + ... + 27600.

It is an arithmetic number, because the mean of its divisors is an integer number (19024000).

Almost surely, 2^204201999 is an apocalyptic number.

204201999 is a deficient number, since it is larger than the sum of its proper divisors (100182001).

204201999 is a wasteful number, since it uses less digits than its factorization.

204201999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46571 (or 46565 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 204201999 is about 14289.9264868648. The cubic root of 204201999 is about 588.8707683611.

The spelling of 204201999 in words is "two hundred four million, two hundred one thousand, nine hundred ninety-nine".