204138563 has 8 divisors (see below), whose sum is σ = 208202400. Its totient is φ = 200082688.

The previous prime is 204138463. The next prime is 204138577. The reversal of 204138563 is 365831402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204138563 - 2⁸ = 204138307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204138463) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99098 + ... + 101136.

It is an arithmetic number, because the mean of its divisors is an integer number (26025300).

Almost surely, 2^204138563 is an apocalyptic number.

204138563 is a deficient number, since it is larger than the sum of its proper divisors (4063837).

204138563 is a wasteful number, since it uses less digits than its factorization.

204138563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3981.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 204138563 is about 14287.7067089159. The cubic root of 204138563 is about 588.8097838537.

Adding to 204138563 its reverse (365831402), we get a palindrome (569969965).

It can be divided in two parts, 2041 and 38563, that added together give a palindrome (40604).

The spelling of 204138563 in words is "two hundred four million, one hundred thirty-eight thousand, five hundred sixty-three".