217741931338 has 16 divisors (see below), whose sum is σ = 332221441824. Its totient is φ = 107004184560.

The previous prime is 217741931287. The next prime is 217741931353. The reversal of 217741931338 is 833139147712.

It is a happy number.

217741931338 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 = 217741931291 and 217741931300.

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, 523320 + ... + 842227.

It is an arithmetic number, because the mean of its divisors is an integer number (20763840114).

Almost surely, 2^217741931338 is an apocalyptic number.

217741931338 is a deficient number, since it is larger than the sum of its proper divisors (114479510486).

217741931338 is a wasteful number, since it uses less digits than its factorization.

217741931338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366917.

The product of its digits is 762048, while the sum is 49.

The spelling of 217741931338 in words is "two hundred seventeen billion, seven hundred forty-one million, nine hundred thirty-one thousand, three hundred thirty-eight".