204545145 has 16 divisors (see below), whose sum is σ = 374025600. Its totient is φ = 93506304.

The previous prime is 204545137. The next prime is 204545167. The reversal of 204545145 is 541545402.

It is not a de Polignac number, because 204545145 - 2³ = 204545137 is a prime.

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 15 ways as a sum of consecutive naturals, for example, 973920 + ... + 974129.

It is an arithmetic number, because the mean of its divisors is an integer number (23376600).

Almost surely, 2^204545145 is an apocalyptic number.

It is an amenable number.

204545145 is a deficient number, since it is larger than the sum of its proper divisors (169480455).

204545145 is a wasteful number, since it uses less digits than its factorization.

204545145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948064.

The product of its (nonzero) digits is 16000, while the sum is 30.

The square root of 204545145 is about 14301.9280168794. The cubic root of 204545145 is about 589.2004346853.

The spelling of 204545145 in words is "two hundred four million, five hundred forty-five thousand, one hundred forty-five".