204112505 has 8 divisors (see below), whose sum is σ = 245127552. Its totient is φ = 163161648.

The previous prime is 204112477. The next prime is 204112507. The reversal of 204112505 is 505211402.

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 204112505 - 2¹⁴ = 204096121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204112507) 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, 8747 + ... + 22016.

It is an arithmetic number, because the mean of its divisors is an integer number (30640944).

Almost surely, 2^204112505 is an apocalyptic number.

It is an amenable number.

204112505 is a deficient number, since it is larger than the sum of its proper divisors (41015047).

204112505 is a wasteful number, since it uses less digits than its factorization.

204112505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32095.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 204112505 is about 14286.7947769960. The cubic root of 204112505 is about 588.7847292078.

Adding to 204112505 its reverse (505211402), we get a palindrome (709323907).

The spelling of 204112505 in words is "two hundred four million, one hundred twelve thousand, five hundred five".