204145171 has 8 divisors (see below), whose sum is σ = 214129440. Its totient is φ = 194253312.

The previous prime is 204145159. The next prime is 204145187. The reversal of 204145171 is 171541402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 204145171 - 2¹⁷ = 204014099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204145141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18556 + ... + 27433.

It is an arithmetic number, because the mean of its divisors is an integer number (26766180).

Almost surely, 2^204145171 is an apocalyptic number.

204145171 is a deficient number, since it is larger than the sum of its proper divisors (9984269).

204145171 is a wasteful number, since it uses less digits than its factorization.

204145171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46205.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 204145171 is about 14287.9379547925. The cubic root of 204145171 is about 588.8161370761.

Adding to 204145171 its reverse (171541402), we get a palindrome (375686573).

The spelling of 204145171 in words is "two hundred four million, one hundred forty-five thousand, one hundred seventy-one".