204115156 has 48 divisors (see below), whose sum is σ = 429004800. Its totient is φ = 83080800.

The previous prime is 204115151. The next prime is 204115169. The reversal of 204115156 is 651511402.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 204115156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204115151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96195 + ... + 98293.

It is an arithmetic number, because the mean of its divisors is an integer number (8937600).

Almost surely, 2^204115156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 204115156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214502400).

204115156 is an abundant number, since it is smaller than the sum of its proper divisors (224889644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

204115156 is a wasteful number, since it uses less digits than its factorization.

204115156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 204115156 is about 14286.8875546775. The cubic root of 204115156 is about 588.7872782294.

Adding to 204115156 its reverse (651511402), we get a palindrome (855626558).

The spelling of 204115156 in words is "two hundred four million, one hundred fifteen thousand, one hundred fifty-six".