217455777082212 has 48 divisors (see below), whose sum is σ = 509116847807232. Its totient is φ = 72239898781440.

The previous prime is 217455777082207. The next prime is 217455777082223. The reversal of 217455777082212 is 212280777554712.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17589703 + ... + 27282030.

It is an arithmetic number, because the mean of its divisors is an integer number (10606600995984).

Almost surely, 2^{217455777082212} is an apocalyptic number.

It is an amenable number.

217455777082212 is an abundant number, since it is smaller than the sum of its proper divisors (291661070725020).

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

217455777082212 is a wasteful number, since it uses less digits than its factorization.

217455777082212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44873108 (or 44873106 counting only the distinct ones).

The product of its (nonzero) digits is 30732800, while the sum is 60.

The spelling of 217455777082212 in words is "two hundred seventeen trillion, four hundred fifty-five billion, seven hundred seventy-seven million, eighty-two thousand, two hundred twelve".