216788827 has 2 divisors, whose sum is σ = 216788828. Its totient is φ = 216788826.

The previous prime is 216788821. The next prime is 216788837. The reversal of 216788827 is 728887612.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216788827 is a prime.

It is not a weakly prime, because it can be changed into another prime (216788821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108394413 + 108394414.

It is an arithmetic number, because the mean of its divisors is an integer number (108394414).

Almost surely, 2^216788827 is an apocalyptic number.

216788827 is a deficient number, since it is larger than the sum of its proper divisors (1).

216788827 is an equidigital number, since it uses as much as digits as its factorization.

216788827 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 49.

The square root of 216788827 is about 14723.7504393412. The cubic root of 216788827 is about 600.7295080409.

The spelling of 216788827 in words is "two hundred sixteen million, seven hundred eighty-eight thousand, eight hundred twenty-seven".