206231306 has 16 divisors (see below), whose sum is σ = 313540416. Its totient is φ = 101727456.

The previous prime is 206231299. The next prime is 206231309. The reversal of 206231306 is 603132602.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (206231309) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43505 + ... + 48011.

It is an arithmetic number, because the mean of its divisors is an integer number (19596276).

Almost surely, 2^206231306 is an apocalyptic number.

206231306 is a deficient number, since it is larger than the sum of its proper divisors (107309110).

206231306 is a wasteful number, since it uses less digits than its factorization.

206231306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4813.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 206231306 is about 14360.7557600566. The cubic root of 206231306 is about 590.8150241413.

Adding to 206231306 its product of nonzero digits (1296), we get a palindrome (206232602).

Adding to 206231306 its reverse (603132602), we get a palindrome (809363908).

It can be divided in two parts, 20 and 6231306, that added together give a palindrome (6231326).

The spelling of 206231306 in words is "two hundred six million, two hundred thirty-one thousand, three hundred six".