206506213 has 16 divisors (see below), whose sum is σ = 222491520. Its totient is φ = 191163456.

The previous prime is 206506211. The next prime is 206506247. The reversal of 206506213 is 312605602.

It is a cyclic number.

It is not a de Polignac number, because 206506213 - 2¹ = 206506211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206506211) 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 15 ways as a sum of consecutive naturals, for example, 192643 + ... + 193711.

It is an arithmetic number, because the mean of its divisors is an integer number (13905720).

Almost surely, 2^206506213 is an apocalyptic number.

206506213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

206506213 is a deficient number, since it is larger than the sum of its proper divisors (15985307).

206506213 is a wasteful number, since it uses less digits than its factorization.

206506213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1356.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 206506213 is about 14370.3240394919. The cubic root of 206506213 is about 591.0774270291.

The spelling of 206506213 in words is "two hundred six million, five hundred six thousand, two hundred thirteen".