204115331 has 6 divisors (see below), whose sum is σ = 237440340. Its totient is φ = 174955956.

The previous prime is 204115319. The next prime is 204115337. The reversal of 204115331 is 133511402.

It is not a de Polignac number, because 204115331 - 2¹⁰ = 204114307 is a prime.

It is a super-2 number, since 2×204115331² = 83326136698479122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204115337) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2082761 + ... + 2082858.

It is an arithmetic number, because the mean of its divisors is an integer number (39573390).

Almost surely, 2^204115331 is an apocalyptic number.

204115331 is a deficient number, since it is larger than the sum of its proper divisors (33325009).

204115331 is an equidigital number, since it uses as much as digits as its factorization.

204115331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4165633 (or 4165626 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 204115331 is about 14286.8936791732. The cubic root of 204115331 is about 588.7874464968.

Adding to 204115331 its reverse (133511402), we get a palindrome (337626733).

The spelling of 204115331 in words is "two hundred four million, one hundred fifteen thousand, three hundred thirty-one".