206252891 has 16 divisors (see below), whose sum is σ = 245415744. Its totient is φ = 171393024.

The previous prime is 206252869. The next prime is 206252903. The reversal of 206252891 is 198252602.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 206252891 - 2¹⁸ = 205990747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206252801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15206 + ... + 25371.

It is an arithmetic number, because the mean of its divisors is an integer number (15338484).

Almost surely, 2^206252891 is an apocalyptic number.

206252891 is a deficient number, since it is larger than the sum of its proper divisors (39162853).

206252891 is a wasteful number, since it uses less digits than its factorization.

206252891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40630.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 206252891 is about 14361.5072676930. The cubic root of 206252891 is about 590.8356357830.

The spelling of 206252891 in words is "two hundred six million, two hundred fifty-two thousand, eight hundred ninety-one".