216740033 has 2 divisors, whose sum is σ = 216740034. Its totient is φ = 216740032.

The previous prime is 216739967. The next prime is 216740039. The reversal of 216740033 is 330047612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165302449 + 51437584 = 12857^2 + 7172^2 .

It is a cyclic number.

It is not a de Polignac number, because 216740033 - 2⁸ = 216739777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216739984 and 216740011.

It is not a weakly prime, because it can be changed into another prime (216740039) 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, 108370016 + 108370017.

It is an arithmetic number, because the mean of its divisors is an integer number (108370017).

Almost surely, 2^216740033 is an apocalyptic number.

It is an amenable number.

216740033 is a deficient number, since it is larger than the sum of its proper divisors (1).

216740033 is an equidigital number, since it uses as much as digits as its factorization.

216740033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 216740033 is about 14722.0933633774. The cubic root of 216740033 is about 600.6844346925.

Adding to 216740033 its reverse (330047612), we get a palindrome (546787645).

The spelling of 216740033 in words is "two hundred sixteen million, seven hundred forty thousand, thirty-three".