216566115219 has 12 divisors (see below), whose sum is σ = 326418492816. Its totient is φ = 138100131312.

The previous prime is 216566115217. The next prime is 216566115221. The reversal of 216566115219 is 912511665612.

216566115219 is a `hidden beast` number, since 2 + 1 + 6 + 5 + 6 + 611 + 5 + 21 + 9 = 666.

216566115219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (216566115217) and next prime (216566115221).

It is not a de Polignac number, because 216566115219 - 2¹ = 216566115217 is a prime.

It is a super-2 number, since 2×216566115219² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (216566115217) 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 in 11 ways as a sum of consecutive naturals, for example, 523106352 + ... + 523106765.

It is an arithmetic number, because the mean of its divisors is an integer number (27201541068).

Almost surely, 2^216566115219 is an apocalyptic number.

216566115219 is a deficient number, since it is larger than the sum of its proper divisors (109852377597).

216566115219 is a wasteful number, since it uses less digits than its factorization.

216566115219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1046213146 (or 1046213143 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 216566115219 in words is "two hundred sixteen billion, five hundred sixty-six million, one hundred fifteen thousand, two hundred nineteen".