206516261 has 8 divisors (see below), whose sum is σ = 241040640. Its totient is φ = 173247408.

The previous prime is 206516257. The next prime is 206516269. The reversal of 206516261 is 162615602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 206516261 - 2² = 206516257 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 (206516269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313526 + ... + 314183.

It is an arithmetic number, because the mean of its divisors is an integer number (30130080).

Almost surely, 2^206516261 is an apocalyptic number.

It is an amenable number.

206516261 is a deficient number, since it is larger than the sum of its proper divisors (34524379).

206516261 is an equidigital number, since it uses as much as digits as its factorization.

206516261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627763.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 206516261 is about 14370.6736446139. The cubic root of 206516261 is about 591.0870135844.

The spelling of 206516261 in words is "two hundred six million, five hundred sixteen thousand, two hundred sixty-one".