217743310961 has 8 divisors (see below), whose sum is σ = 237578908800. Its totient is φ = 197914505040.

The previous prime is 217743310943. The next prime is 217743310979. The reversal of 217743310961 is 169013347712.

It is an interprime number because it is at equal distance from previous prime (217743310943) and next prime (217743310979).

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 217743310961 - 2¹⁰ = 217743309937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217743310931) 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, 1630826 + ... + 1759283.

It is an arithmetic number, because the mean of its divisors is an integer number (29697363600).

Almost surely, 2^217743310961 is an apocalyptic number.

It is an amenable number.

217743310961 is a deficient number, since it is larger than the sum of its proper divisors (19835597839).

217743310961 is a wasteful number, since it uses less digits than its factorization.

217743310961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395959.

The product of its (nonzero) digits is 190512, while the sum is 44.

The spelling of 217743310961 in words is "two hundred seventeen billion, seven hundred forty-three million, three hundred ten thousand, nine hundred sixty-one".