217051112055 has 16 divisors (see below), whose sum is σ = 349221905280. Its totient is φ = 115113884448.

The previous prime is 217051112023. The next prime is 217051112063. The reversal of 217051112055 is 550211150712.

It is not a de Polignac number, because 217051112055 - 2⁵ = 217051112023 is a prime.

It is a super-2 number, since 2×217051112055² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40416517 + ... + 40421886.

It is an arithmetic number, because the mean of its divisors is an integer number (21826369080).

Almost surely, 2^217051112055 is an apocalyptic number.

217051112055 is a deficient number, since it is larger than the sum of its proper divisors (132170793225).

217051112055 is a wasteful number, since it uses less digits than its factorization.

217051112055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80838590.

The product of its (nonzero) digits is 3500, while the sum is 30.

Adding to 217051112055 its reverse (550211150712), we get a palindrome (767262262767).

The spelling of 217051112055 in words is "two hundred seventeen billion, fifty-one million, one hundred twelve thousand, fifty-five".