204400145 has 8 divisors (see below), whose sum is σ = 245379456. Its totient is φ = 163453936.

The previous prime is 204400139. The next prime is 204400169. The reversal of 204400145 is 541004402.

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 204400145 - 2¹⁰ = 204399121 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8354 + ... + 21876.

It is an arithmetic number, because the mean of its divisors is an integer number (30672432).

Almost surely, 2^204400145 is an apocalyptic number.

It is an amenable number.

204400145 is a deficient number, since it is larger than the sum of its proper divisors (40979311).

204400145 is a wasteful number, since it uses less digits than its factorization.

204400145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16551.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 204400145 is about 14296.8578715744. The cubic root of 204400145 is about 589.0611756825.

Adding to 204400145 its reverse (541004402), we get a palindrome (745404547).

The spelling of 204400145 in words is "two hundred four million, four hundred thousand, one hundred forty-five".