206135223 has 32 divisors (see below), whose sum is σ = 332439552. Its totient is φ = 111064800.

The previous prime is 206135173. The next prime is 206135233. The reversal of 206135223 is 322531602.

It is not a de Polignac number, because 206135223 - 2⁶ = 206135159 is a prime.

It is a super-2 number, since 2×206135223² = 84983460322519458, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206135193 and 206135202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206135233) 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 31 ways as a sum of consecutive naturals, for example, 31288 + ... + 37298.

It is an arithmetic number, because the mean of its divisors is an integer number (10388736).

Almost surely, 2^206135223 is an apocalyptic number.

206135223 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

206135223 is a deficient number, since it is larger than the sum of its proper divisors (126304329).

206135223 is a wasteful number, since it uses less digits than its factorization.

206135223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6115.

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 206135223 is about 14357.4100380257. The cubic root of 206135223 is about 590.7232564730.

Adding to 206135223 its reverse (322531602), we get a palindrome (528666825).

The spelling of 206135223 in words is "two hundred six million, one hundred thirty-five thousand, two hundred twenty-three".