217700013 has 16 divisors (see below), whose sum is σ = 307264320. Its totient is φ = 136867584.

The previous prime is 217700003. The next prime is 217700047. The reversal of 217700013 is 310007712.

It is not a de Polignac number, because 217700013 - 2⁴ = 217699997 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217700003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25356 + ... + 32837.

It is an arithmetic number, because the mean of its divisors is an integer number (19204020).

Almost surely, 2^217700013 is an apocalyptic number.

It is an amenable number.

217700013 is a deficient number, since it is larger than the sum of its proper divisors (89564307).

217700013 is a wasteful number, since it uses less digits than its factorization.

217700013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58268.

The product of its (nonzero) digits is 294, while the sum is 21.

The square root of 217700013 is about 14754.6607212772. The cubic root of 217700013 is about 601.5699744949.

Adding to 217700013 its reverse (310007712), we get a palindrome (527707725).

The spelling of 217700013 in words is "two hundred seventeen million, seven hundred thousand, thirteen".