206143344329 has 4 divisors (see below), whose sum is σ = 222000524676. Its totient is φ = 190286163984.

The previous prime is 206143344299. The next prime is 206143344353. The reversal of 206143344329 is 923443341602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 923443341602 = 2 ⋅461721670801.

It can be written as a sum of positive squares in 2 ways, for example, as 36461138704 + 169682205625 = 190948^2 + 411925^2 .

It is a cyclic number.

It is not a de Polignac number, because 206143344329 - 2³² = 201848377033 is a prime.

It is a super-2 number, since 2×206143344329² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206143344389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7928590154 + ... + 7928590179.

It is an arithmetic number, because the mean of its divisors is an integer number (55500131169).

Almost surely, 2^206143344329 is an apocalyptic number.

It is an amenable number.

206143344329 is a deficient number, since it is larger than the sum of its proper divisors (15857180347).

206143344329 is a wasteful number, since it uses less digits than its factorization.

206143344329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15857180346.

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 206143344329 in words is "two hundred six billion, one hundred forty-three million, three hundred forty-four thousand, three hundred twenty-nine".