205015 has 8 divisors (see below), whose sum is σ = 248688. Its totient is φ = 162240.

The previous prime is 204983. The next prime is 205019. The reversal of 205015 is 510502.

205015 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 205015 - 2⁵ = 204983 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204986 and 205004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205019) 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, 499 + ... + 811.

It is an arithmetic number, because the mean of its divisors is an integer number (31086).

2²⁰⁵⁰¹⁵ is an apocalyptic number.

205015 is a deficient number, since it is larger than the sum of its proper divisors (43673).

205015 is a wasteful number, since it uses less digits than its factorization.

205015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449.

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 205015 is about 452.7858213328. The cubic root of 205015 is about 58.9651235033.

Adding to 205015 its reverse (510502), we get a palindrome (715517).

The spelling of 205015 in words is "two hundred five thousand, fifteen".