206205366131 has 4 divisors (see below), whose sum is σ = 206486683872. Its totient is φ = 205924048392.

The previous prime is 206205366113. The next prime is 206205366221. The reversal of 206205366131 is 131663502602.

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

It is a cyclic number.

It is not a de Polignac number, because 206205366131 - 2²⁶ = 206138257267 is a prime.

It is a super-2 number, since 2×206205366131² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206205366091 and 206205366100.

It is not an unprimeable number, because it can be changed into a prime (206205365131) 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, 140657771 + ... + 140659236.

It is an arithmetic number, because the mean of its divisors is an integer number (51621670968).

Almost surely, 2^206205366131 is an apocalyptic number.

206205366131 is a deficient number, since it is larger than the sum of its proper divisors (281317741).

206205366131 is an equidigital number, since it uses as much as digits as its factorization.

206205366131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281317740.

The product of its (nonzero) digits is 38880, while the sum is 35.

Adding to 206205366131 its reverse (131663502602), we get a palindrome (337868868733).

The spelling of 206205366131 in words is "two hundred six billion, two hundred five million, three hundred sixty-six thousand, one hundred thirty-one".