206171216 has 20 divisors (see below), whose sum is σ = 406007124. Its totient is φ = 101395200.

The previous prime is 206171209. The next prime is 206171227. The reversal of 206171216 is 612171602.

It can be written as a sum of positive squares in 2 ways, for example, as 15178816 + 190992400 = 3896^2 + 13820^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104645 + ... + 106596.

Almost surely, 2^206171216 is an apocalyptic number.

It is an amenable number.

206171216 is a deficient number, since it is larger than the sum of its proper divisors (199835908).

206171216 is a wasteful number, since it uses less digits than its factorization.

206171216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211310 (or 211304 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 206171216 is about 14358.6634475497. The cubic root of 206171216 is about 590.7576362756.

The spelling of 206171216 in words is "two hundred six million, one hundred seventy-one thousand, two hundred sixteen".