206601156 has 36 divisors (see below), whose sum is σ = 527421804. Its totient is φ = 68184000.

The previous prime is 206601151. The next prime is 206601217. The reversal of 206601156 is 651106602.

It is a happy number.

206601156 is a `hidden beast` number, since 2 + 0 + 6 + 601 + 1 + 56 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 149084100 + 57517056 = 12210^2 + 7584^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206601151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24775 + ... + 32046.

Almost surely, 2^206601156 is an apocalyptic number.

It is an amenable number.

206601156 is an abundant number, since it is smaller than the sum of its proper divisors (320820648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206601156 is a wasteful number, since it uses less digits than its factorization.

206601156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56932 (or 56927 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 206601156 is about 14373.6270996572. The cubic root of 206601156 is about 591.1679974535.

Adding to 206601156 its reverse (651106602), we get a palindrome (857707758).

The spelling of 206601156 in words is "two hundred six million, six hundred one thousand, one hundred fifty-six".