216677911 has 2 divisors, whose sum is σ = 216677912. Its totient is φ = 216677910.

The previous prime is 216677899. The next prime is 216677927. The reversal of 216677911 is 119776612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216677911 - 2⁹ = 216677399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216675911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108338955 + 108338956.

It is an arithmetic number, because the mean of its divisors is an integer number (108338956).

Almost surely, 2^216677911 is an apocalyptic number.

216677911 is a deficient number, since it is larger than the sum of its proper divisors (1).

216677911 is an equidigital number, since it uses as much as digits as its factorization.

216677911 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 40.

The square root of 216677911 is about 14719.9833899363. The cubic root of 216677911 is about 600.6270398438.

The spelling of 216677911 in words is "two hundred sixteen million, six hundred seventy-seven thousand, nine hundred eleven".