217047047052 has 96 divisors (see below), whose sum is σ = 590662485504. Its totient is φ = 61301836800.

The previous prime is 217047047039. The next prime is 217047047081. The reversal of 217047047052 is 250740740712.

217047047052 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 217047047052.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 238399 + ... + 700662.

It is an arithmetic number, because the mean of its divisors is an integer number (6152734224).

Almost surely, 2^217047047052 is an apocalyptic number.

217047047052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

217047047052 is an abundant number, since it is smaller than the sum of its proper divisors (373615438452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217047047052 is a wasteful number, since it uses less digits than its factorization.

217047047052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939199 (or 939197 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 39.

Adding to 217047047052 its reverse (250740740712), we get a palindrome (467787787764).

The spelling of 217047047052 in words is "two hundred seventeen billion, forty-seven million, forty-seven thousand, fifty-two".