206402350135 has 4 divisors (see below), whose sum is σ = 247682820168. Its totient is φ = 165121880104.

The previous prime is 206402350123. The next prime is 206402350157. The reversal of 206402350135 is 531053204602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-206402350135 is a prime.

It is a super-2 number, since 2×206402350135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206402350097 and 206402350106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20640235009 + ... + 20640235018.

It is an arithmetic number, because the mean of its divisors is an integer number (61920705042).

Almost surely, 2^206402350135 is an apocalyptic number.

206402350135 is a deficient number, since it is larger than the sum of its proper divisors (41280470033).

206402350135 is an equidigital number, since it uses as much as digits as its factorization.

206402350135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41280470032.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 206402350135 its reverse (531053204602), we get a palindrome (737455554737).

The spelling of 206402350135 in words is "two hundred six billion, four hundred two million, three hundred fifty thousand, one hundred thirty-five".