217930383211 has 4 divisors (see below), whose sum is σ = 229400403400. Its totient is φ = 206460363024.

The previous prime is 217930383197. The next prime is 217930383217. The reversal of 217930383211 is 112383039712.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 217930383211 - 2⁹ = 217930382699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217930383217) 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, 5735010066 + ... + 5735010103.

It is an arithmetic number, because the mean of its divisors is an integer number (57350100850).

Almost surely, 2^217930383211 is an apocalyptic number.

217930383211 is a deficient number, since it is larger than the sum of its proper divisors (11470020189).

217930383211 is a wasteful number, since it uses less digits than its factorization.

217930383211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11470020188.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 217930383211 in words is "two hundred seventeen billion, nine hundred thirty million, three hundred eighty-three thousand, two hundred eleven".