204425505 has 32 divisors (see below), whose sum is σ = 370293120. Its totient is φ = 106966080.

The previous prime is 204425497. The next prime is 204425519. The reversal of 204425505 is 505524402.

It is not a de Polignac number, because 204425505 - 2³ = 204425497 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7131 + ... + 21440.

It is an arithmetic number, because the mean of its divisors is an integer number (11571660).

Almost surely, 2^204425505 is an apocalyptic number.

It is an amenable number.

204425505 is a deficient number, since it is larger than the sum of its proper divisors (165867615).

204425505 is a wasteful number, since it uses less digits than its factorization.

204425505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28638 (or 28632 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 204425505 is about 14297.7447522328. The cubic root of 204425505 is about 589.0855363528.

Adding to 204425505 its reverse (505524402), we get a palindrome (709949907).

The spelling of 204425505 in words is "two hundred four million, four hundred twenty-five thousand, five hundred five".