204605153 has 8 divisors (see below), whose sum is σ = 210962472. Its totient is φ = 198291456.

The previous prime is 204605131. The next prime is 204605189. The reversal of 204605153 is 351506402.

It can be written as a sum of positive squares in 4 ways, for example, as 120846049 + 83759104 = 10993^2 + 9152^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204605153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204601153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1250 + ... + 20267.

It is an arithmetic number, because the mean of its divisors is an integer number (26370309).

Almost surely, 2^204605153 is an apocalyptic number.

It is an amenable number.

204605153 is a deficient number, since it is larger than the sum of its proper divisors (6357319).

204605153 is a wasteful number, since it uses less digits than its factorization.

204605153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21811.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 204605153 is about 14304.0257620014. The cubic root of 204605153 is about 589.2580475294.

The spelling of 204605153 in words is "two hundred four million, six hundred five thousand, one hundred fifty-three".