266323213 has 12 divisors (see below), whose sum is σ = 289165620. Its totient is φ = 245172096.

The previous prime is 266323159. The next prime is 266323231. The reversal of 266323213 is 312323662.

It can be written as a sum of positive squares in 6 ways, for example, as 10259209 + 256064004 = 3203^2 + 16002^2 .

It is not a de Polignac number, because 266323213 - 2⁹ = 266322701 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 (266323243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67195 + ... + 71047.

It is an arithmetic number, because the mean of its divisors is an integer number (24097135).

Almost surely, 2^266323213 is an apocalyptic number.

It is an amenable number.

266323213 is a deficient number, since it is larger than the sum of its proper divisors (22842407).

266323213 is a wasteful number, since it uses less digits than its factorization.

266323213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288 (or 4275 counting only the distinct ones).

The product of its digits is 7776, while the sum is 28.

The square root of 266323213 is about 16319.4121524030. The cubic root of 266323213 is about 643.3831369595.

Adding to 266323213 its reverse (312323662), we get a palindrome (578646875).

The spelling of 266323213 in words is "two hundred sixty-six million, three hundred twenty-three thousand, two hundred thirteen".