217308319444 has 24 divisors (see below), whose sum is σ = 382211101440. Its totient is φ = 108105765696.

The previous prime is 217308319387. The next prime is 217308319477. The reversal of 217308319444 is 444913803712.

217308319444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 217308319394 and 217308319403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1346472 + ... + 1499200.

It is an arithmetic number, because the mean of its divisors is an integer number (15925462560).

Almost surely, 2^217308319444 is an apocalyptic number.

It is an amenable number.

217308319444 is a deficient number, since it is larger than the sum of its proper divisors (164902781996).

217308319444 is a wasteful number, since it uses less digits than its factorization.

217308319444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154527 (or 154525 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 217308319444 in words is "two hundred seventeen billion, three hundred eight million, three hundred nineteen thousand, four hundred forty-four".