2189559812 has 24 divisors (see below), whose sum is σ = 4425956640. Its totient is φ = 936709760.

The previous prime is 2189559809. The next prime is 2189559817.

2189559812 is nontrivially palindromic in base 10.

It is not an unprimeable number, because it can be changed into a prime (2189559817) 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, 1462862 + ... + 1464357.

It is an arithmetic number, because the mean of its divisors is an integer number (184414860).

Almost surely, 2^2189559812 is an apocalyptic number.

2189559812 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

2189559812 is an abundant number, since it is smaller than the sum of its proper divisors (2236396828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2189559812 is a wasteful number, since it uses less digits than its factorization.

2189559812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2927251 (or 2927249 counting only the distinct ones).

The product of its digits is 518400, while the sum is 50.

The square root of 2189559812 is about 46792.7324699039. The cubic root of 2189559812 is about 1298.5308476089.

The spelling of 2189559812 in words is "two billion, one hundred eighty-nine million, five hundred fifty-nine thousand, eight hundred twelve".