204115215 has 8 divisors (see below), whose sum is σ = 326584368. Its totient is φ = 108861440.

The previous prime is 204115213. The next prime is 204115231. The reversal of 204115215 is 512511402.

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

It is not a de Polignac number, because 204115215 - 2¹ = 204115213 is a prime.

It is a super-3 number, since 3×204115215³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 204115191 and 204115200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204115213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6803826 + ... + 6803855.

It is an arithmetic number, because the mean of its divisors is an integer number (40823046).

Almost surely, 2^204115215 is an apocalyptic number.

204115215 is a deficient number, since it is larger than the sum of its proper divisors (122469153).

204115215 is a wasteful number, since it uses less digits than its factorization.

204115215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13607689.

The product of its (nonzero) digits is 400, while the sum is 21.

The square root of 204115215 is about 14286.8896195078. The cubic root of 204115215 is about 588.7873349596.

Adding to 204115215 its reverse (512511402), we get a palindrome (716626617).

The spelling of 204115215 in words is "two hundred four million, one hundred fifteen thousand, two hundred fifteen".