217012113 has 12 divisors (see below), whose sum is σ = 320131968. Its totient is φ = 141596280.

The previous prime is 217012073. The next prime is 217012189. The reversal of 217012113 is 311210712.

It is a happy number.

It is not a de Polignac number, because 217012113 - 2¹⁴ = 216995729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217032113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256093 + ... + 256938.

It is an arithmetic number, because the mean of its divisors is an integer number (26677664).

Almost surely, 2^217012113 is an apocalyptic number.

It is an amenable number.

217012113 is a deficient number, since it is larger than the sum of its proper divisors (103119855).

217012113 is a wasteful number, since it uses less digits than its factorization.

217012113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513084 (or 513081 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 217012113 is about 14731.3309989288. The cubic root of 217012113 is about 600.9356817410.

Adding to 217012113 its reverse (311210712), we get a palindrome (528222825).

The spelling of 217012113 in words is "two hundred seventeen million, twelve thousand, one hundred thirteen".