204509061 has 12 divisors (see below), whose sum is σ = 295593792. Its totient is φ = 136250856.

The previous prime is 204509057. The next prime is 204509087. The reversal of 204509061 is 160905402.

It is not a de Polignac number, because 204509061 - 2² = 204509057 is a prime.

It is a super-2 number, since 2×204509061² = 83647912062203442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204509021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9220 + ... + 22226.

It is an arithmetic number, because the mean of its divisors is an integer number (24632816).

Almost surely, 2^204509061 is an apocalyptic number.

It is an amenable number.

204509061 is a deficient number, since it is larger than the sum of its proper divisors (91084731).

204509061 is a wasteful number, since it uses less digits than its factorization.

204509061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14760 (or 14757 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 204509061 is about 14300.6664530014. Note that the first 3 decimals coincide. The cubic root of 204509061 is about 589.1657855148.

The spelling of 204509061 in words is "two hundred four million, five hundred nine thousand, sixty-one".