206438133211 has 8 divisors (see below), whose sum is σ = 210555815904. Its totient is φ = 202354064640.

The previous prime is 206438133199. The next prime is 206438133227. The reversal of 206438133211 is 112331834602.

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 206438133211 - 2²³ = 206429744603 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206438133241) 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, 8391126 + ... + 8415691.

It is an arithmetic number, because the mean of its divisors is an integer number (26319476988).

Almost surely, 2^206438133211 is an apocalyptic number.

206438133211 is a deficient number, since it is larger than the sum of its proper divisors (4117682693).

206438133211 is a wasteful number, since it uses less digits than its factorization.

206438133211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16807061.

The product of its (nonzero) digits is 20736, while the sum is 34.

Adding to 206438133211 its reverse (112331834602), we get a palindrome (318769967813).

The spelling of 206438133211 in words is "two hundred six billion, four hundred thirty-eight million, one hundred thirty-three thousand, two hundred eleven".