216733313 has 2 divisors, whose sum is σ = 216733314. Its totient is φ = 216733312.

The previous prime is 216733291. The next prime is 216733331. The reversal of 216733313 is 313337612.

Together with next prime (216733331) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 193961329 + 22771984 = 13927^2 + 4772^2 .

It is a cyclic number.

It is not a de Polignac number, because 216733313 - 2⁶ = 216733249 is a prime.

It is not a weakly prime, because it can be changed into another prime (216733613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108366656 + 108366657.

It is an arithmetic number, because the mean of its divisors is an integer number (108366657).

Almost surely, 2^216733313 is an apocalyptic number.

It is an amenable number.

216733313 is a deficient number, since it is larger than the sum of its proper divisors (1).

216733313 is an equidigital number, since it uses as much as digits as its factorization.

216733313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 29.

The square root of 216733313 is about 14721.8651331956. The cubic root of 216733313 is about 600.6782265775.

The spelling of 216733313 in words is "two hundred sixteen million, seven hundred thirty-three thousand, three hundred thirteen".