204145172 has 36 divisors (see below), whose sum is σ = 453366144. Its totient is φ = 79536240.

The previous prime is 204145159. The next prime is 204145187. The reversal of 204145172 is 271541402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45188 + ... + 49499.

It is an arithmetic number, because the mean of its divisors is an integer number (12593504).

Almost surely, 2^204145172 is an apocalyptic number.

204145172 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

204145172 is an abundant number, since it is smaller than the sum of its proper divisors (249220972).

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

204145172 is a wasteful number, since it uses less digits than its factorization.

204145172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94716 (or 94707 counting only the distinct ones).

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

The square root of 204145172 is about 14287.9379897870. The cubic root of 204145172 is about 588.8161380376.

Adding to 204145172 its reverse (271541402), we get a palindrome (475686574).

The spelling of 204145172 in words is "two hundred four million, one hundred forty-five thousand, one hundred seventy-two".