216353329 has 2 divisors, whose sum is σ = 216353330. Its totient is φ = 216353328.

The previous prime is 216353321. The next prime is 216353353. The reversal of 216353329 is 923353612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211411600 + 4941729 = 14540^2 + 2223^2 .

It is a cyclic number.

It is not a de Polignac number, because 216353329 - 2³ = 216353321 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216353294 and 216353303.

It is not a weakly prime, because it can be changed into another prime (216353321) 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, 108176664 + 108176665.

It is an arithmetic number, because the mean of its divisors is an integer number (108176665).

Almost surely, 2^216353329 is an apocalyptic number.

It is an amenable number.

216353329 is a deficient number, since it is larger than the sum of its proper divisors (1).

216353329 is an equidigital number, since it uses as much as digits as its factorization.

216353329 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 34.

The square root of 216353329 is about 14708.9540416714. The cubic root of 216353329 is about 600.3269782578.

It can be divided in two parts, 21635 and 3329, that added together give a square (24964 = 158²).

The spelling of 216353329 in words is "two hundred sixteen million, three hundred fifty-three thousand, three hundred twenty-nine".