217246245212 has 24 divisors (see below), whose sum is σ = 384013346304. Its totient is φ = 107531891712.

The previous prime is 217246245211. The next prime is 217246245247. The reversal of 217246245212 is 212542642712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217246245211) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 235733 + ... + 700044.

It is an arithmetic number, because the mean of its divisors is an integer number (16000556096).

Almost surely, 2^217246245212 is an apocalyptic number.

It is an amenable number.

217246245212 is a deficient number, since it is larger than the sum of its proper divisors (166767101092).

217246245212 is a wasteful number, since it uses less digits than its factorization.

217246245212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 936365 (or 936363 counting only the distinct ones).

The product of its digits is 107520, while the sum is 38.

Adding to 217246245212 its reverse (212542642712), we get a palindrome (429788887924).

The spelling of 217246245212 in words is "two hundred seventeen billion, two hundred forty-six million, two hundred forty-five thousand, two hundred twelve".