217239056133892 has 48 divisors (see below), whose sum is σ = 435439054858752. Its totient is φ = 93943119536640.

The previous prime is 217239056133887. The next prime is 217239056133907. The reversal of 217239056133892 is 298331650932712.

It is a self number, because there is not a number n which added to its sum of digits gives 217239056133892.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550801834 + ... + 551196097.

It is an arithmetic number, because the mean of its divisors is an integer number (9071646976224).

Almost surely, 2^{217239056133892} is an apocalyptic number.

It is an amenable number.

217239056133892 is an abundant number, since it is smaller than the sum of its proper divisors (218199998724860).

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

217239056133892 is a wasteful number, since it uses less digits than its factorization.

217239056133892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1101998188 (or 1101998186 counting only the distinct ones).

The product of its (nonzero) digits is 29393280, while the sum is 61.

The spelling of 217239056133892 in words is "two hundred seventeen trillion, two hundred thirty-nine billion, fifty-six million, one hundred thirty-three thousand, eight hundred ninety-two".