206631133 has 4 divisors (see below), whose sum is σ = 207680220. Its totient is φ = 205582048.

The previous prime is 206631121. The next prime is 206631167. The reversal of 206631133 is 331136602.

206631133 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 97574884 + 109056249 = 9878^2 + 10443^2 .

It is a cyclic number.

It is not a de Polignac number, because 206631133 - 2⁵ = 206631101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 206631098 and 206631107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206631533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524248 + ... + 524641.

It is an arithmetic number, because the mean of its divisors is an integer number (51920055).

Almost surely, 2^206631133 is an apocalyptic number.

It is an amenable number.

206631133 is a deficient number, since it is larger than the sum of its proper divisors (1049087).

206631133 is a wasteful number, since it uses less digits than its factorization.

206631133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049086.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 206631133 is about 14374.6698396868. The cubic root of 206631133 is about 591.1965881067.

Adding to 206631133 its reverse (331136602), we get a palindrome (537767735).

The spelling of 206631133 in words is "two hundred six million, six hundred thirty-one thousand, one hundred thirty-three".