206128253 has 2 divisors, whose sum is σ = 206128254. Its totient is φ = 206128252.

The previous prime is 206128199. The next prime is 206128271. The reversal of 206128253 is 352821602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192571129 + 13557124 = 13877^2 + 3682^2 .

It is a cyclic number.

It is not a de Polignac number, because 206128253 - 2¹² = 206124157 is a prime.

It is a Chen prime.

It is equal to p_11399312 and since 206128253 and 11399312 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206122253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103064126 + 103064127.

It is an arithmetic number, because the mean of its divisors is an integer number (103064127).

Almost surely, 2^206128253 is an apocalyptic number.

It is an amenable number.

206128253 is a deficient number, since it is larger than the sum of its proper divisors (1).

206128253 is an equidigital number, since it uses as much as digits as its factorization.

206128253 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 206128253 is about 14357.1673041725. The cubic root of 206128253 is about 590.7165984042.

Adding to 206128253 its reverse (352821602), we get a palindrome (558949855).

The spelling of 206128253 in words is "two hundred six million, one hundred twenty-eight thousand, two hundred fifty-three".