216986113 has 6 divisors (see below), whose sum is σ = 230501126. Its totient is φ = 204221952.

The previous prime is 216986101. The next prime is 216986141. The reversal of 216986113 is 311689612.

216986113 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 77580864 + 139405249 = 8808^2 + 11807^2 .

It is not a de Polignac number, because 216986113 - 2¹³ = 216977921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216986513) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 375120 + ... + 375697.

Almost surely, 2^216986113 is an apocalyptic number.

It is an amenable number.

216986113 is a deficient number, since it is larger than the sum of its proper divisors (13515013).

216986113 is an equidigital number, since it uses as much as digits as its factorization.

216986113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750851 (or 750834 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 216986113 is about 14730.4484996215. The cubic root of 216986113 is about 600.9116816187.

The spelling of 216986113 in words is "two hundred sixteen million, nine hundred eighty-six thousand, one hundred thirteen".