217297700122441 has 3 divisors (see below), whose sum is σ = 217297714863463. Its totient is φ = 217297685381420.

The previous prime is 217297700122423. The next prime is 217297700122483. The reversal of 217297700122441 is 144221007792712.

The square root of 217297700122441 is 14741021.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 33675145574841 + 183622554547600 = 5803029^2 + 13550740^2 .

It is not a de Polignac number, because 217297700122441 - 2⁵ = 217297700122409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217297700122541) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 7370511 + ... + 22111531.

Almost surely, 2^{217297700122441} is an apocalyptic number.

217297700122441 is the 14741021-st square number.

217297700122441 is the 7370511-st centered octagonal number.

It is an amenable number.

217297700122441 is a deficient number, since it is larger than the sum of its proper divisors (14741022).

217297700122441 is an frugal number, since it uses more digits than its factorization.

217297700122441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29482042 (or 14741021 counting only the distinct ones).

The product of its (nonzero) digits is 790272, while the sum is 49.

The spelling of 217297700122441 in words is "two hundred seventeen trillion, two hundred ninety-seven billion, seven hundred million, one hundred twenty-two thousand, four hundred forty-one".