2217185745 has 32 divisors (see below), whose sum is σ = 3604298880. Its totient is φ = 1163704320.

The previous prime is 2217185731. The next prime is 2217185759. The reversal of 2217185745 is 5475817122.

It is an interprime number because it is at equal distance from previous prime (2217185731) and next prime (2217185759).

It is not a de Polignac number, because 2217185745 - 2⁷ = 2217185617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2217185697 and 2217185706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259146 + ... + 267564.

It is an arithmetic number, because the mean of its divisors is an integer number (112634340).

Almost surely, 2^2217185745 is an apocalyptic number.

It is an amenable number.

2217185745 is a deficient number, since it is larger than the sum of its proper divisors (1387113135).

2217185745 is a wasteful number, since it uses less digits than its factorization.

2217185745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8705.

The product of its digits is 156800, while the sum is 42.

The square root of 2217185745 is about 47087.0018688810. The cubic root of 2217185745 is about 1303.9692775783.

The spelling of 2217185745 in words is "two billion, two hundred seventeen million, one hundred eighty-five thousand, seven hundred forty-five".