206841538 has 4 divisors (see below), whose sum is σ = 310262310. Its totient is φ = 103420768.

The previous prime is 206841511. The next prime is 206841559. The reversal of 206841538 is 835148602.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 202692169 + 4149369 = 14237^2 + 2037^2 .

It is a junction number, because it is equal to n+sod(n) for n = 206841497 and 206841506.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51710383 + ... + 51710386.

Almost surely, 2^206841538 is an apocalyptic number.

206841538 is a deficient number, since it is larger than the sum of its proper divisors (103420772).

206841538 is a wasteful number, since it uses less digits than its factorization.

206841538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103420771.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 206841538 is about 14381.9865804415. The cubic root of 206841538 is about 591.3971847276.

It can be divided in two parts, 20684 and 1538, that added together give a palindrome (22222).

The spelling of 206841538 in words is "two hundred six million, eight hundred forty-one thousand, five hundred thirty-eight".