217171230530 has 8 divisors (see below), whose sum is σ = 390908214972. Its totient is φ = 86868492208.

The previous prime is 217171230491. The next prime is 217171230553. The reversal of 217171230530 is 35032171712.

217171230530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 216728422681 + 442807849 = 465541^2 + 21043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10858561517 + ... + 10858561536.

Almost surely, 2^217171230530 is an apocalyptic number.

217171230530 is a deficient number, since it is larger than the sum of its proper divisors (173736984442).

217171230530 is a wasteful number, since it uses less digits than its factorization.

217171230530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21717123060.

The product of its (nonzero) digits is 8820, while the sum is 32.

The spelling of 217171230530 in words is "two hundred seventeen billion, one hundred seventy-one million, two hundred thirty thousand, five hundred thirty".