216303361 has 2 divisors, whose sum is σ = 216303362. Its totient is φ = 216303360.

The previous prime is 216303349. The next prime is 216303371. The reversal of 216303361 is 163303612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190992400 + 25310961 = 13820^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 216303361 - 2¹³ = 216295169 is a prime.

It is not a weakly prime, because it can be changed into another prime (216303341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108151680 + 108151681.

It is an arithmetic number, because the mean of its divisors is an integer number (108151681).

Almost surely, 2^216303361 is an apocalyptic number.

It is an amenable number.

216303361 is a deficient number, since it is larger than the sum of its proper divisors (1).

216303361 is an equidigital number, since it uses as much as digits as its factorization.

216303361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 216303361 is about 14707.2553863731. The cubic root of 216303361 is about 600.2807584188.

Adding to 216303361 its reverse (163303612), we get a palindrome (379606973).

The spelling of 216303361 in words is "two hundred sixteen million, three hundred three thousand, three hundred sixty-one".