206399271 has 32 divisors (see below), whose sum is σ = 309944320. Its totient is φ = 121305600.

The previous prime is 206399267. The next prime is 206399279. The reversal of 206399271 is 172993602.

It is not a de Polignac number, because 206399271 - 2² = 206399267 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206399279) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94431 + ... + 96591.

It is an arithmetic number, because the mean of its divisors is an integer number (9685760).

Almost surely, 2^206399271 is an apocalyptic number.

206399271 is a deficient number, since it is larger than the sum of its proper divisors (103545049).

206399271 is a wasteful number, since it uses less digits than its factorization.

206399271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 206399271 is about 14366.6026255340. The cubic root of 206399271 is about 590.9753769649.

The spelling of 206399271 in words is "two hundred six million, three hundred ninety-nine thousand, two hundred seventy-one".