206561343 has 16 divisors (see below), whose sum is σ = 284368896. Its totient is φ = 133270560.

The previous prime is 206561297. The next prime is 206561347. The reversal of 206561343 is 343165602.

It is not a de Polignac number, because 206561343 - 2²⁰ = 205512767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206561343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206561347) 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, 16330 + ... + 26072.

It is an arithmetic number, because the mean of its divisors is an integer number (17773056).

Almost surely, 2^206561343 is an apocalyptic number.

206561343 is a deficient number, since it is larger than the sum of its proper divisors (77807553).

206561343 is a wasteful number, since it uses less digits than its factorization.

206561343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9974.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 206561343 is about 14372.2421006606. The cubic root of 206561343 is about 591.1300214099.

The spelling of 206561343 in words is "two hundred six million, five hundred sixty-one thousand, three hundred forty-three".