206400135 has 16 divisors (see below), whose sum is σ = 347621760. Its totient is φ = 104286240.

The previous prime is 206400119. The next prime is 206400157. The reversal of 206400135 is 531004602.

It is a happy number.

206400135 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206400135 - 2⁴ = 206400119 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 361821 + ... + 362390.

It is an arithmetic number, because the mean of its divisors is an integer number (21726360).

Almost surely, 2^206400135 is an apocalyptic number.

206400135 is a deficient number, since it is larger than the sum of its proper divisors (141221625).

206400135 is a wasteful number, since it uses less digits than its factorization.

206400135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724238.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 206400135 is about 14366.6326952421. The cubic root of 206400135 is about 590.9762015835.

Adding to 206400135 its reverse (531004602), we get a palindrome (737404737).

The spelling of 206400135 in words is "two hundred six million, four hundred thousand, one hundred thirty-five".