213208171 has 12 divisors (see below), whose sum is σ = 240691696. Its totient is φ = 188583120.

The previous prime is 213208157. The next prime is 213208187. The reversal of 213208171 is 171802312.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-213208171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213208871) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19335 + ... + 28288.

Almost surely, 2^213208171 is an apocalyptic number.

213208171 is a deficient number, since it is larger than the sum of its proper divisors (27483525).

213208171 is a wasteful number, since it uses less digits than its factorization.

213208171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47682 (or 47671 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 213208171 is about 14601.6495985899. The cubic root of 213208171 is about 597.4037552068.

The spelling of 213208171 in words is "two hundred thirteen million, two hundred eight thousand, one hundred seventy-one".