217234489832 has 8 divisors (see below), whose sum is σ = 407314668450. Its totient is φ = 108617244912.

The previous prime is 217234489789. The next prime is 217234489867. The reversal of 217234489832 is 238984432712.

It can be written as a sum of positive squares in only one way, i.e., 199296173476 + 17938316356 = 446426^2 + 133934^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×217234489832² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 13577155607 + ... + 13577155622.

Almost surely, 2^217234489832 is an apocalyptic number.

It is an amenable number.

217234489832 is a deficient number, since it is larger than the sum of its proper divisors (190080178618).

217234489832 is a wasteful number, since it uses less digits than its factorization.

217234489832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27154311235 (or 27154311231 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The spelling of 217234489832 in words is "two hundred seventeen billion, two hundred thirty-four million, four hundred eighty-nine thousand, eight hundred thirty-two".