215268811 has 2 divisors, whose sum is σ = 215268812. Its totient is φ = 215268810.

The previous prime is 215268731. The next prime is 215268821. The reversal of 215268811 is 118862512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 215268811 - 2¹¹ = 215266763 is a prime.

It is not a weakly prime, because it can be changed into another prime (215268821) 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 as a sum of consecutive naturals, namely, 107634405 + 107634406.

It is an arithmetic number, because the mean of its divisors is an integer number (107634406).

Almost surely, 2^215268811 is an apocalyptic number.

215268811 is a deficient number, since it is larger than the sum of its proper divisors (1).

215268811 is an equidigital number, since it uses as much as digits as its factorization.

215268811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 34.

The square root of 215268811 is about 14672.0418142807. The cubic root of 215268811 is about 599.3222077659.

The spelling of 215268811 in words is "two hundred fifteen million, two hundred sixty-eight thousand, eight hundred eleven".