216017273 has 2 divisors, whose sum is σ = 216017274. Its totient is φ = 216017272.

The previous prime is 216017257. The next prime is 216017279. The reversal of 216017273 is 372710612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 215854864 + 162409 = 14692^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 216017273 - 2⁴ = 216017257 is a prime.

It is not a weakly prime, because it can be changed into another prime (216017279) 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, 108008636 + 108008637.

It is an arithmetic number, because the mean of its divisors is an integer number (108008637).

Almost surely, 2^216017273 is an apocalyptic number.

It is an amenable number.

216017273 is a deficient number, since it is larger than the sum of its proper divisors (1).

216017273 is an equidigital number, since it uses as much as digits as its factorization.

216017273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3528, while the sum is 29.

The square root of 216017273 is about 14697.5260843449. The cubic root of 216017273 is about 600.0159930922.

Adding to 216017273 its reverse (372710612), we get a palindrome (588727885).

The spelling of 216017273 in words is "two hundred sixteen million, seventeen thousand, two hundred seventy-three".