217489596213 has 4 divisors (see below), whose sum is σ = 289986128288. Its totient is φ = 144993064140.

The previous prime is 217489596209. The next prime is 217489596227. The reversal of 217489596213 is 312695984712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 217489596213 - 2² = 217489596209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217489591213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36248266033 + ... + 36248266038.

It is an arithmetic number, because the mean of its divisors is an integer number (72496532072).

Almost surely, 2^217489596213 is an apocalyptic number.

It is an amenable number.

217489596213 is a deficient number, since it is larger than the sum of its proper divisors (72496532075).

217489596213 is an equidigital number, since it uses as much as digits as its factorization.

217489596213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72496532074.

The product of its digits is 6531840, while the sum is 57.

The spelling of 217489596213 in words is "two hundred seventeen billion, four hundred eighty-nine million, five hundred ninety-six thousand, two hundred thirteen".