204500161 has 8 divisors (see below), whose sum is σ = 206712000. Its totient is φ = 202300560.

The previous prime is 204500117. The next prime is 204500171. The reversal of 204500161 is 161005402.

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 204500161 - 2¹¹ = 204498113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204500171) 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, 32751 + ... + 38491.

It is an arithmetic number, because the mean of its divisors is an integer number (25839000).

Almost surely, 2^204500161 is an apocalyptic number.

It is an amenable number.

204500161 is a deficient number, since it is larger than the sum of its proper divisors (2211839).

204500161 is a wasteful number, since it uses less digits than its factorization.

204500161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 204500161 is about 14300.3552753070. The cubic root of 204500161 is about 589.1572387842.

Adding to 204500161 its reverse (161005402), we get a palindrome (365505563).

The spelling of 204500161 in words is "two hundred four million, five hundred thousand, one hundred sixty-one".