217454252712712 has 16 divisors (see below), whose sum is σ = 408056333170860. Its totient is φ = 108639230533824.

The previous prime is 217454252712701. The next prime is 217454252712761. The reversal of 217454252712712 is 217217252454712.

It can be written as a sum of positive squares in 2 ways, for example, as 186276256669636 + 31177996043076 = 13648306^2 + 5583726^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 217454252712712.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10986967303 + ... + 10986987094.

Almost surely, 2^{217454252712712} is an apocalyptic number.

It is an amenable number.

217454252712712 is a deficient number, since it is larger than the sum of its proper divisors (190602080458148).

217454252712712 is a wasteful number, since it uses less digits than its factorization.

217454252712712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21973955640 (or 21973955636 counting only the distinct ones).

The product of its digits is 4390400, while the sum is 52.

The spelling of 217454252712712 in words is "two hundred seventeen trillion, four hundred fifty-four billion, two hundred fifty-two million, seven hundred twelve thousand, seven hundred twelve".