204566113 has 4 divisors (see below), whose sum is σ = 206675140. Its totient is φ = 202457088.

The previous prime is 204566059. The next prime is 204566119. The reversal of 204566113 is 311665402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311665402 = 2 ⋅155832701.

It can be written as a sum of positive squares in 2 ways, for example, as 168169024 + 36397089 = 12968^2 + 6033^2 .

It is a cyclic number.

It is not a de Polignac number, because 204566113 - 2²¹ = 202468961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204566119) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1054368 + ... + 1054561.

It is an arithmetic number, because the mean of its divisors is an integer number (51668785).

Almost surely, 2^204566113 is an apocalyptic number.

It is an amenable number.

204566113 is a deficient number, since it is larger than the sum of its proper divisors (2109027).

204566113 is an equidigital number, since it uses as much as digits as its factorization.

204566113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109026.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 204566113 is about 14302.6610461131. The cubic root of 204566113 is about 589.2205670504.

It can be divided in two parts, 20456 and 6113, that added together give a square (26569 = 163²).

The spelling of 204566113 in words is "two hundred four million, five hundred sixty-six thousand, one hundred thirteen".