206312611 has 2 divisors, whose sum is σ = 206312612. Its totient is φ = 206312610.

The previous prime is 206312597. The next prime is 206312627. The reversal of 206312611 is 116213602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 206312611 - 2¹³ = 206304419 is a prime.

It is not a weakly prime, because it can be changed into another prime (206312651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103156305 + 103156306.

It is an arithmetic number, because the mean of its divisors is an integer number (103156306).

Almost surely, 2^206312611 is an apocalyptic number.

206312611 is a deficient number, since it is larger than the sum of its proper divisors (1).

206312611 is an equidigital number, since it uses as much as digits as its factorization.

206312611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 206312611 is about 14363.5862861613. The cubic root of 206312611 is about 590.8926552653.

Subtracting from 206312611 its reverse (116213602), we obtain a palindrome (90099009).

The spelling of 206312611 in words is "two hundred six million, three hundred twelve thousand, six hundred eleven".