2217346985 has 16 divisors (see below), whose sum is σ = 3041709312. Its totient is φ = 1520078400.

The previous prime is 2217346961. The next prime is 2217346991. The reversal of 2217346985 is 5896437122.

It is not a de Polignac number, because 2217346985 - 2⁶ = 2217346921 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 228380 + ... + 237890.

It is an arithmetic number, because the mean of its divisors is an integer number (190106832).

Almost surely, 2^2217346985 is an apocalyptic number.

It is an amenable number.

2217346985 is a deficient number, since it is larger than the sum of its proper divisors (824362327).

2217346985 is an equidigital number, since it uses as much as digits as its factorization.

2217346985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16184.

The product of its digits is 725760, while the sum is 47.

The square root of 2217346985 is about 47088.7139875363. The cubic root of 2217346985 is about 1304.0008862531. Note that the first 3 decimals are identical.

The spelling of 2217346985 in words is "two billion, two hundred seventeen million, three hundred forty-six thousand, nine hundred eighty-five".