204505101 has 16 divisors (see below), whose sum is σ = 303710400. Its totient is φ = 136003824.

The previous prime is 204505099. The next prime is 204505117. The reversal of 204505101 is 101505402.

It is not a de Polignac number, because 204505101 - 2¹ = 204505099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204505201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2275 + ... + 20351.

It is an arithmetic number, because the mean of its divisors is an integer number (18981900).

Almost surely, 2^204505101 is an apocalyptic number.

It is an amenable number.

204505101 is a deficient number, since it is larger than the sum of its proper divisors (99205299).

204505101 is a wasteful number, since it uses less digits than its factorization.

204505101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18505 (or 18499 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 204505101 is about 14300.5279972454. The cubic root of 204505101 is about 589.1619827304.

The spelling of 204505101 in words is "two hundred four million, five hundred five thousand, one hundred one".