217632848021 has 8 divisors (see below), whose sum is σ = 220889163264. Its totient is φ = 214376770080.

The previous prime is 217632847979. The next prime is 217632848047. The reversal of 217632848021 is 120848236712.

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

It is a cyclic number.

It is not a de Polignac number, because 217632848021 - 2³⁴ = 200452978837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217632848621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2839361 + ... + 2915001.

It is an arithmetic number, because the mean of its divisors is an integer number (27611145408).

Almost surely, 2^217632848021 is an apocalyptic number.

It is an amenable number.

217632848021 is a deficient number, since it is larger than the sum of its proper divisors (3256315243).

217632848021 is an equidigital number, since it uses as much as digits as its factorization.

217632848021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118651.

The product of its (nonzero) digits is 258048, while the sum is 44.

The spelling of 217632848021 in words is "two hundred seventeen billion, six hundred thirty-two million, eight hundred forty-eight thousand, twenty-one".