206356213 has 4 divisors (see below), whose sum is σ = 235835680. Its totient is φ = 176876748.

The previous prime is 206356127. The next prime is 206356219. The reversal of 206356213 is 312653602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206356213 - 2²¹ = 204259061 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 (206356219) 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, 14739723 + ... + 14739736.

It is an arithmetic number, because the mean of its divisors is an integer number (58958920).

Almost surely, 2^206356213 is an apocalyptic number.

It is an amenable number.

206356213 is a deficient number, since it is larger than the sum of its proper divisors (29479467).

206356213 is an equidigital number, since it uses as much as digits as its factorization.

206356213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29479466.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 206356213 is about 14365.1040024081. The cubic root of 206356213 is about 590.9342786488.

The spelling of 206356213 in words is "two hundred six million, three hundred fifty-six thousand, two hundred thirteen".