216648827 has 2 divisors, whose sum is σ = 216648828. Its totient is φ = 216648826.

The previous prime is 216648823. The next prime is 216648829. The reversal of 216648827 is 728846612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216648827 - 2² = 216648823 is a prime.

Together with 216648829, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216648823) 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, 108324413 + 108324414.

It is an arithmetic number, because the mean of its divisors is an integer number (108324414).

Almost surely, 2^216648827 is an apocalyptic number.

216648827 is a deficient number, since it is larger than the sum of its proper divisors (1).

216648827 is an equidigital number, since it uses as much as digits as its factorization.

216648827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 258048, while the sum is 44.

The square root of 216648827 is about 14718.9954480596. The cubic root of 216648827 is about 600.6001652101.

The spelling of 216648827 in words is "two hundred sixteen million, six hundred forty-eight thousand, eight hundred twenty-seven".