206230257 has 6 divisors (see below), whose sum is σ = 297888162. Its totient is φ = 137486832.

The previous prime is 206230249. The next prime is 206230291. The reversal of 206230257 is 752032602.

206230257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 145950561 + 60279696 = 12081^2 + 7764^2 .

It is not a de Polignac number, because 206230257 - 2³ = 206230249 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 206230257.

It is not an unprimeable number, because it can be changed into a prime (206230217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11457228 + ... + 11457245.

It is an arithmetic number, because the mean of its divisors is an integer number (49648027).

Almost surely, 2^206230257 is an apocalyptic number.

It is an amenable number.

206230257 is a deficient number, since it is larger than the sum of its proper divisors (91657905).

206230257 is a wasteful number, since it uses less digits than its factorization.

206230257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22914479 (or 22914476 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 206230257 is about 14360.7192368628. The cubic root of 206230257 is about 590.8140224084.

Adding to 206230257 its reverse (752032602), we get a palindrome (958262859).

The spelling of 206230257 in words is "two hundred six million, two hundred thirty thousand, two hundred fifty-seven".