206507223122 has 6 divisors (see below), whose sum is σ = 309761798679. Its totient is φ = 103253290230.

The previous prime is 206507223089. The next prime is 206507223149. The reversal of 206507223122 is 221322705602.

It can be written as a sum of positive squares in only one way, i.e., 103253611561 + 103253611561 = 321331^2 + 321331^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=321331.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 481997 + ... + 803327.

Almost surely, 2^206507223122 is an apocalyptic number.

206507223122 is a deficient number, since it is larger than the sum of its proper divisors (103254575557).

206507223122 is an frugal number, since it uses more digits than its factorization.

206507223122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642664 (or 321333 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

Multiplying 206507223122 by its sum of digits (32), we get a square (6608231139904 = 2570648²).

Adding to 206507223122 its reverse (221322705602), we get a palindrome (427829928724).

The spelling of 206507223122 in words is "two hundred six billion, five hundred seven million, two hundred twenty-three thousand, one hundred twenty-two".