266242215 has 16 divisors (see below), whose sum is σ = 429971328. Its totient is φ = 140667936.

The previous prime is 266242213. The next prime is 266242217. The reversal of 266242215 is 512242662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (266242213) and next prime (266242217).

It is not a de Polignac number, because 266242215 - 2¹ = 266242213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (266242213) 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, 81337 + ... + 84546.

It is an arithmetic number, because the mean of its divisors is an integer number (26873208).

Almost surely, 2^266242215 is an apocalyptic number.

266242215 is a deficient number, since it is larger than the sum of its proper divisors (163729113).

266242215 is a wasteful number, since it uses less digits than its factorization.

266242215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165998.

The product of its digits is 11520, while the sum is 30.

The square root of 266242215 is about 16316.9303179244. The cubic root of 266242215 is about 643.3179054053.

Adding to 266242215 its reverse (512242662), we get a palindrome (778484877).

The spelling of 266242215 in words is "two hundred sixty-six million, two hundred forty-two thousand, two hundred fifteen".