206631253 has 4 divisors (see below), whose sum is σ = 206919360. Its totient is φ = 206343148.

The previous prime is 206631221. The next prime is 206631301. The reversal of 206631253 is 352136602.

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 206631253 - 2⁵ = 206631221 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 (206631353) 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 in 3 ways as a sum of consecutive naturals, for example, 142975 + ... + 144412.

It is an arithmetic number, because the mean of its divisors is an integer number (51729840).

Almost surely, 2^206631253 is an apocalyptic number.

It is an amenable number.

206631253 is a deficient number, since it is larger than the sum of its proper divisors (288107).

206631253 is an equidigital number, since it uses as much as digits as its factorization.

206631253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288106.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 206631253 is about 14374.6740136951. The cubic root of 206631253 is about 591.1967025515.

Adding to 206631253 its reverse (352136602), we get a palindrome (558767855).

The spelling of 206631253 in words is "two hundred six million, six hundred thirty-one thousand, two hundred fifty-three".