216873311 has 2 divisors, whose sum is σ = 216873312. Its totient is φ = 216873310.

The previous prime is 216873299. The next prime is 216873323. The reversal of 216873311 is 113378612.

It is a balanced prime because it is at equal distance from previous prime (216873299) and next prime (216873323).

It is a cyclic number.

It is not a de Polignac number, because 216873311 - 2⁶ = 216873247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216873511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108436655 + 108436656.

It is an arithmetic number, because the mean of its divisors is an integer number (108436656).

Almost surely, 2^216873311 is an apocalyptic number.

216873311 is a deficient number, since it is larger than the sum of its proper divisors (1).

216873311 is an equidigital number, since it uses as much as digits as its factorization.

216873311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 216873311 is about 14726.6191299972. The cubic root of 216873311 is about 600.8075339569.

The spelling of 216873311 in words is "two hundred sixteen million, eight hundred seventy-three thousand, three hundred eleven".