200020171 has 4 divisors (see below), whose sum is σ = 215406352. Its totient is φ = 184633992.

The previous prime is 200020157. The next prime is 200020189. The reversal of 200020171 is 171020002.

200020171 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 200020171 - 2⁷ = 200020043 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 15386167 = 200020171 / (2 + 0 + 0 + 0 + 2 + 0 + 1 + 7 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (200020141) 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, 7693071 + ... + 7693096.

It is an arithmetic number, because the mean of its divisors is an integer number (53851588).

Almost surely, 2^200020171 is an apocalyptic number.

200020171 is a deficient number, since it is larger than the sum of its proper divisors (15386181).

200020171 is a wasteful number, since it uses less digits than its factorization.

200020171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15386180.

The product of its (nonzero) digits is 28, while the sum is 13.

The square root of 200020171 is about 14142.8487582948. The cubic root of 200020171 is about 584.8232071023.

Adding to 200020171 its reverse (171020002), we get a palindrome (371040173).

The spelling of 200020171 in words is "two hundred million, twenty thousand, one hundred seventy-one".