204115247 has 4 divisors (see below), whose sum is σ = 233274576. Its totient is φ = 174955920.

The previous prime is 204115237. The next prime is 204115259. The reversal of 204115247 is 742511402.

204115247 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 204115247 - 2⁴ = 204115231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204115207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14579654 + ... + 14579667.

It is an arithmetic number, because the mean of its divisors is an integer number (58318644).

Almost surely, 2^204115247 is an apocalyptic number.

204115247 is a deficient number, since it is larger than the sum of its proper divisors (29159329).

204115247 is an equidigital number, since it uses as much as digits as its factorization.

204115247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29159328.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 204115247 is about 14286.8907394156. The cubic root of 204115247 is about 588.7873657285.

Adding to 204115247 its reverse (742511402), we get a palindrome (946626649).

The spelling of 204115247 in words is "two hundred four million, one hundred fifteen thousand, two hundred forty-seven".