266402213 has 16 divisors (see below), whose sum is σ = 335195520. Its totient is φ = 205675200.

The previous prime is 266402197. The next prime is 266402231. The reversal of 266402213 is 312204662.

It is a cyclic number.

It is not a de Polignac number, because 266402213 - 2⁴ = 266402197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266402263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7478 + ... + 24263.

It is an arithmetic number, because the mean of its divisors is an integer number (20949720).

Almost surely, 2^266402213 is an apocalyptic number.

It is an amenable number.

266402213 is a deficient number, since it is larger than the sum of its proper divisors (68793307).

266402213 is a wasteful number, since it uses less digits than its factorization.

266402213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31868.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 266402213 is about 16321.8324032567. The cubic root of 266402213 is about 643.4467466894.

Adding to 266402213 its reverse (312204662), we get a palindrome (578606875).

The spelling of 266402213 in words is "two hundred sixty-six million, four hundred two thousand, two hundred thirteen".