216216667 has 2 divisors, whose sum is σ = 216216668. Its totient is φ = 216216666.

The previous prime is 216216647. The next prime is 216216677. The reversal of 216216667 is 766612612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216216667 - 2¹⁵ = 216183899 is a prime.

It is not a weakly prime, because it can be changed into another prime (216216607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108108333 + 108108334.

It is an arithmetic number, because the mean of its divisors is an integer number (108108334).

Almost surely, 2^216216667 is an apocalyptic number.

216216667 is a deficient number, since it is larger than the sum of its proper divisors (1).

216216667 is an equidigital number, since it uses as much as digits as its factorization.

216216667 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 216216667 is about 14704.3077701740. The cubic root of 216216667 is about 600.2005505509.

The spelling of 216216667 in words is "two hundred sixteen million, two hundred sixteen thousand, six hundred sixty-seven".