206133161 has 4 divisors (see below), whose sum is σ = 221989572. Its totient is φ = 190276752.

The previous prime is 206133097. The next prime is 206133181. The reversal of 206133161 is 161331602.

It is a happy number.

206133161 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 15555136 + 190578025 = 3944^2 + 13805^2 .

It is a cyclic number.

It is not a de Polignac number, because 206133161 - 2⁶ = 206133097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206133181) 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, 7928186 + ... + 7928211.

It is an arithmetic number, because the mean of its divisors is an integer number (55497393).

Almost surely, 2^206133161 is an apocalyptic number.

It is an amenable number.

206133161 is a deficient number, since it is larger than the sum of its proper divisors (15856411).

206133161 is a wasteful number, since it uses less digits than its factorization.

206133161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15856410.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 206133161 is about 14357.3382282372. The cubic root of 206133161 is about 590.7212867702.

Adding to 206133161 its reverse (161331602), we get a palindrome (367464763).

The spelling of 206133161 in words is "two hundred six million, one hundred thirty-three thousand, one hundred sixty-one".