216068311 has 2 divisors, whose sum is σ = 216068312. Its totient is φ = 216068310.

The previous prime is 216068287. The next prime is 216068329. The reversal of 216068311 is 113860612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216068311 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216068311.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216038311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108034155 + 108034156.

It is an arithmetic number, because the mean of its divisors is an integer number (108034156).

Almost surely, 2^216068311 is an apocalyptic number.

216068311 is a deficient number, since it is larger than the sum of its proper divisors (1).

216068311 is an equidigital number, since it uses as much as digits as its factorization.

216068311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 216068311 is about 14699.2622603993. The cubic root of 216068311 is about 600.0632442593.

The spelling of 216068311 in words is "two hundred sixteen million, sixty-eight thousand, three hundred eleven".