204123415 has 4 divisors (see below), whose sum is σ = 244948104. Its totient is φ = 163298728.

The previous prime is 204123401. The next prime is 204123427. The reversal of 204123415 is 514321402.

204123415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 204123415 - 2¹¹ = 204121367 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 20412337 + ... + 20412346.

It is an arithmetic number, because the mean of its divisors is an integer number (61237026).

Almost surely, 2^204123415 is an apocalyptic number.

204123415 is a deficient number, since it is larger than the sum of its proper divisors (40824689).

204123415 is an equidigital number, since it uses as much as digits as its factorization.

204123415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40824688.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 204123415 is about 14287.1765930152. The cubic root of 204123415 is about 588.7952193816.

Adding to 204123415 its reverse (514321402), we get a palindrome (718444817).

The spelling of 204123415 in words is "two hundred four million, one hundred twenty-three thousand, four hundred fifteen".