206682161 has 4 divisors (see below), whose sum is σ = 236208192. Its totient is φ = 177156132.

The previous prime is 206682121. The next prime is 206682167. The reversal of 206682161 is 161286602.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 206682161 - 2¹⁴ = 206665777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (206682167) 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, 14763005 + ... + 14763018.

It is an arithmetic number, because the mean of its divisors is an integer number (59052048).

Almost surely, 2^206682161 is an apocalyptic number.

It is an amenable number.

206682161 is a deficient number, since it is larger than the sum of its proper divisors (29526031).

206682161 is an equidigital number, since it uses as much as digits as its factorization.

206682161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29526030.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 206682161 is about 14376.4446578422. Note that the first 3 decimals coincide. The cubic root of 206682161 is about 591.2452498549.

The spelling of 206682161 in words is "two hundred six million, six hundred eighty-two thousand, one hundred sixty-one".