204399550 has 12 divisors (see below), whose sum is σ = 380183256. Its totient is φ = 81759800.

The previous prime is 204399539. The next prime is 204399589. The reversal of 204399550 is 55993402.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2043946 + ... + 2044045.

It is an arithmetic number, because the mean of its divisors is an integer number (31681938).

Almost surely, 2^204399550 is an apocalyptic number.

204399550 is a deficient number, since it is larger than the sum of its proper divisors (175783706).

204399550 is a wasteful number, since it uses less digits than its factorization.

204399550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4088003 (or 4087998 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 37.

The square root of 204399550 is about 14296.8370627912. The cubic root of 204399550 is about 589.0606041047.

The spelling of 204399550 in words is "two hundred four million, three hundred ninety-nine thousand, five hundred fifty".