206132261 has 4 divisors (see below), whose sum is σ = 213240300. Its totient is φ = 199024224.

The previous prime is 206132257. The next prime is 206132263. The reversal of 206132261 is 162231602.

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 73444900 + 132687361 = 8570^2 + 11519^2 .

It is a cyclic number.

It is not a de Polignac number, because 206132261 - 2² = 206132257 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206132263) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 3553976 + ... + 3554033.

It is an arithmetic number, because the mean of its divisors is an integer number (53310075).

Almost surely, 2^206132261 is an apocalyptic number.

It is an amenable number.

206132261 is a deficient number, since it is larger than the sum of its proper divisors (7108039).

206132261 is an equidigital number, since it uses as much as digits as its factorization.

206132261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7108038.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 206132261 is about 14357.3068853459. The cubic root of 206132261 is about 590.7204270509.

Adding to 206132261 its reverse (162231602), we get a palindrome (368363863).

The spelling of 206132261 in words is "two hundred six million, one hundred thirty-two thousand, two hundred sixty-one".