206440211343 has 4 divisors (see below), whose sum is σ = 275253615128. Its totient is φ = 137626807560.

The previous prime is 206440211323. The next prime is 206440211357. The reversal of 206440211343 is 343112044602.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 206440211343 - 2⁵ = 206440211311 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 206440211343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206440211323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34406701888 + ... + 34406701893.

It is an arithmetic number, because the mean of its divisors is an integer number (68813403782).

Almost surely, 2^206440211343 is an apocalyptic number.

206440211343 is a deficient number, since it is larger than the sum of its proper divisors (68813403785).

206440211343 is an equidigital number, since it uses as much as digits as its factorization.

206440211343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68813403784.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 206440211343 its reverse (343112044602), we get a palindrome (549552255945).

The spelling of 206440211343 in words is "two hundred six billion, four hundred forty million, two hundred eleven thousand, three hundred forty-three".