204115 has 4 divisors (see below), whose sum is σ = 244944.
Its totient is φ = 163288.
The previous prime is 204107. The next prime is 204133. The reversal of 204115 is 511402.
Adding to 204115 its reverse (511402), we get a palindrome (715517).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
It is not a de Polignac number, because 204115 - 23 = 204107 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 204095 and 204104.
It is an unprimeable number.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20407 + ... + 20416.
It is an arithmetic number, because the mean of its divisors is an integer number (61236).
2204115 is an apocalyptic number.
204115 is a deficient number, since it is larger than the sum of its proper divisors (40829).
204115 is an equidigital number, since it uses as much as digits as its factorization.
204115 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 40828.
The product of its (nonzero) digits is 40, while the sum is 13.
The square root of 204115 is about 451.7908808287.
The cubic root of 204115 is about 58.8787128231.
The spelling of 204115 in words is "two hundred four thousand, one hundred fifteen".