216345667 has 2 divisors, whose sum is σ = 216345668. Its totient is φ = 216345666.

The previous prime is 216345637. The next prime is 216345677. The reversal of 216345667 is 766543612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216345667 - 2¹⁹ = 215821379 is a prime.

It is not a weakly prime, because it can be changed into another prime (216345607) 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, 108172833 + 108172834.

It is an arithmetic number, because the mean of its divisors is an integer number (108172834).

Almost surely, 2^216345667 is an apocalyptic number.

216345667 is a deficient number, since it is larger than the sum of its proper divisors (1).

216345667 is an equidigital number, since it uses as much as digits as its factorization.

216345667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 40.

The square root of 216345667 is about 14708.6935857676. The cubic root of 216345667 is about 600.3198914558.

The spelling of 216345667 in words is "two hundred sixteen million, three hundred forty-five thousand, six hundred sixty-seven".