204325505 has 4 divisors (see below), whose sum is σ = 245190612. Its totient is φ = 163460400.

The previous prime is 204325493. The next prime is 204325543. The reversal of 204325505 is 505523402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 505523402 = 2 ⋅252761701.

It can be written as a sum of positive squares in 2 ways, for example, as 39639616 + 164685889 = 6296^2 + 12833^2 .

It is not a de Polignac number, because 204325505 - 2⁸ = 204325249 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20432546 + ... + 20432555.

It is an arithmetic number, because the mean of its divisors is an integer number (61297653).

Almost surely, 2^204325505 is an apocalyptic number.

It is an amenable number.

204325505 is a deficient number, since it is larger than the sum of its proper divisors (40865107).

204325505 is an equidigital number, since it uses as much as digits as its factorization.

204325505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40865106.

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 204325505 is about 14294.2472694437. The cubic root of 204325505 is about 588.9894652326.

Adding to 204325505 its reverse (505523402), we get a palindrome (709848907).

The spelling of 204325505 in words is "two hundred four million, three hundred twenty-five thousand, five hundred five".