206031213 has 12 divisors (see below), whose sum is σ = 300548508. Its totient is φ = 135993600.

The previous prime is 206031197. The next prime is 206031223. The reversal of 206031213 is 312130602.

It can be written as a sum of positive squares in 2 ways, for example, as 203148009 + 2883204 = 14253^2 + 1698^2 .

It is not a de Polignac number, because 206031213 - 2⁴ = 206031197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206031223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112420 + ... + 114237.

It is an arithmetic number, because the mean of its divisors is an integer number (25045709).

Almost surely, 2^206031213 is an apocalyptic number.

It is an amenable number.

206031213 is a deficient number, since it is larger than the sum of its proper divisors (94517295).

206031213 is a wasteful number, since it uses less digits than its factorization.

206031213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226764 (or 226761 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 206031213 is about 14353.7874096003. The cubic root of 206031213 is about 590.6238856786.

Adding to 206031213 its reverse (312130602), we get a palindrome (518161815).

The spelling of 206031213 in words is "two hundred six million, thirty-one thousand, two hundred thirteen".