217955226883056 has 40 divisors (see below), whose sum is σ = 606362618381520. Its totient is φ = 67063146733056.

The previous prime is 217955226883027. The next prime is 217955226883073. The reversal of 217955226883056 is 650388622559712.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 174643610661 + ... + 174643611908.

It is an arithmetic number, because the mean of its divisors is an integer number (15159065459538).

Almost surely, 2^{217955226883056} is an apocalyptic number.

217955226883056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

217955226883056 is an abundant number, since it is smaller than the sum of its proper divisors (388407391498464).

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

217955226883056 is a wasteful number, since it uses less digits than its factorization.

217955226883056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349287222593 (or 349287222587 counting only the distinct ones).

The product of its (nonzero) digits is 435456000, while the sum is 69.

The spelling of 217955226883056 in words is "two hundred seventeen trillion, nine hundred fifty-five billion, two hundred twenty-six million, eight hundred eighty-three thousand, fifty-six".