216716660231 has 2 divisors, whose sum is σ = 216716660232. Its totient is φ = 216716660230.

The previous prime is 216716660141. The next prime is 216716660267. The reversal of 216716660231 is 132066617612.

216716660231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216716660231 is a prime.

It is a super-2 number, since 2×216716660231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216716660731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108358330115 + 108358330116.

It is an arithmetic number, because the mean of its divisors is an integer number (108358330116).

Almost surely, 2^216716660231 is an apocalyptic number.

216716660231 is a deficient number, since it is larger than the sum of its proper divisors (1).

216716660231 is an equidigital number, since it uses as much as digits as its factorization.

216716660231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 216716660231 in words is "two hundred sixteen billion, seven hundred sixteen million, six hundred sixty thousand, two hundred thirty-one".