206247261 has 64 divisors (see below), whose sum is σ = 330946560. Its totient is φ = 112896000.

The previous prime is 206247259. The next prime is 206247271. The reversal of 206247261 is 162742602.

206247261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 206247261 - 2¹ = 206247259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206247211) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1825141 + ... + 1825253.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^206247261 is an apocalyptic number.

It is an amenable number.

206247261 is a deficient number, since it is larger than the sum of its proper divisors (124699299).

206247261 is a wasteful number, since it uses less digits than its factorization.

206247261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 206247261 is about 14361.3112562885. The cubic root of 206247261 is about 590.8302598020.

Adding to 206247261 its reverse (162742602), we get a palindrome (368989863).

The spelling of 206247261 in words is "two hundred six million, two hundred forty-seven thousand, two hundred sixty-one".