216424667 has 2 divisors, whose sum is σ = 216424668. Its totient is φ = 216424666.

The previous prime is 216424643. The next prime is 216424679. The reversal of 216424667 is 766424612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216424667 - 2¹⁰ = 216423643 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 216424667.

It is not a weakly prime, because it can be changed into another prime (216424627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108212333 + 108212334.

It is an arithmetic number, because the mean of its divisors is an integer number (108212334).

Almost surely, 2^216424667 is an apocalyptic number.

216424667 is a deficient number, since it is larger than the sum of its proper divisors (1).

216424667 is an equidigital number, since it uses as much as digits as its factorization.

216424667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 38.

The square root of 216424667 is about 14711.3788272888. The cubic root of 216424667 is about 600.3929527759.

Subtracting 216424667 from its reverse (766424612), we obtain a palindrome (549999945).

The spelling of 216424667 in words is "two hundred sixteen million, four hundred twenty-four thousand, six hundred sixty-seven".