216985942267 has 2 divisors, whose sum is σ = 216985942268. Its totient is φ = 216985942266.

The previous prime is 216985942253. The next prime is 216985942291. The reversal of 216985942267 is 762249589612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216985942267 - 2⁷ = 216985942139 is a prime.

It is not a weakly prime, because it can be changed into another prime (216985942237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108492971133 + 108492971134.

It is an arithmetic number, because the mean of its divisors is an integer number (108492971134).

Almost surely, 2^216985942267 is an apocalyptic number.

216985942267 is a deficient number, since it is larger than the sum of its proper divisors (1).

216985942267 is an equidigital number, since it uses as much as digits as its factorization.

216985942267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26127360, while the sum is 61.

The spelling of 216985942267 in words is "two hundred sixteen billion, nine hundred eighty-five million, nine hundred forty-two thousand, two hundred sixty-seven".