2197284865 has 16 divisors (see below), whose sum is σ = 2703654288. Its totient is φ = 1713643776.

The previous prime is 2197284857. The next prime is 2197284931. The reversal of 2197284865 is 5684827912.

It can be written as a sum of positive squares in 8 ways, for example, as 420578064 + 1776706801 = 20508^2 + 42151^2 .

It is a cyclic number.

It is not a de Polignac number, because 2197284865 - 2³ = 2197284857 is a prime.

It is a Duffinian 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, 15199 + ... + 68011.

It is an arithmetic number, because the mean of its divisors is an integer number (168978393).

Almost surely, 2^2197284865 is an apocalyptic number.

It is an amenable number.

2197284865 is a deficient number, since it is larger than the sum of its proper divisors (506369423).

2197284865 is a wasteful number, since it uses less digits than its factorization.

2197284865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53028.

The product of its digits is 1935360, while the sum is 52.

The square root of 2197284865 is about 46875.2052262174. The cubic root of 2197284865 is about 1300.0561839623.

The spelling of 2197284865 in words is "two billion, one hundred ninety-seven million, two hundred eighty-four thousand, eight hundred sixty-five".