204104545 has 4 divisors (see below), whose sum is σ = 244925460. Its totient is φ = 163283632.

The previous prime is 204104539. The next prime is 204104573. The reversal of 204104545 is 545401402.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 38390416 + 165714129 = 6196^2 + 12873^2 .

It is a cyclic number.

It is not a de Polignac number, because 204104545 - 2⁵ = 204104513 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20410450 + ... + 20410459.

It is an arithmetic number, because the mean of its divisors is an integer number (61231365).

Almost surely, 2^204104545 is an apocalyptic number.

It is an amenable number.

204104545 is a deficient number, since it is larger than the sum of its proper divisors (40820915).

204104545 is an equidigital number, since it uses as much as digits as its factorization.

204104545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40820914.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 204104545 is about 14286.5161953501. The cubic root of 204104545 is about 588.7770752796. Note that the first 3 decimals are identical.

Adding to 204104545 its reverse (545401402), we get a palindrome (749505947).

The spelling of 204104545 in words is "two hundred four million, one hundred four thousand, five hundred forty-five".