206506004243 has 8 divisors (see below), whose sum is σ = 257462031360. Its totient is φ = 160913769480.

The previous prime is 206506004239. The next prime is 206506004261. The reversal of 206506004243 is 342400605602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206506004243 - 2² = 206506004239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206506004233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1340948003 + ... + 1340948156.

It is an arithmetic number, because the mean of its divisors is an integer number (32182753920).

Almost surely, 2^206506004243 is an apocalyptic number.

206506004243 is a deficient number, since it is larger than the sum of its proper divisors (50956027117).

206506004243 is a wasteful number, since it uses less digits than its factorization.

206506004243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2681896177.

The product of its (nonzero) digits is 34560, while the sum is 32.

Adding to 206506004243 its reverse (342400605602), we get a palindrome (548906609845).

The spelling of 206506004243 in words is "two hundred six billion, five hundred six million, four thousand, two hundred forty-three".