2185332109 has 4 divisors (see below), whose sum is σ = 2207861404. Its totient is φ = 2162802816.

The previous prime is 2185332047. The next prime is 2185332119. The reversal of 2185332109 is 9012335812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1368630025 + 816702084 = 36995^2 + 28578^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185332109 - 2⁹ = 2185331597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2185332119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11264502 + ... + 11264695.

It is an arithmetic number, because the mean of its divisors is an integer number (551965351).

Almost surely, 2^2185332109 is an apocalyptic number.

It is an amenable number.

2185332109 is a deficient number, since it is larger than the sum of its proper divisors (22529295).

2185332109 is an equidigital number, since it uses as much as digits as its factorization.

2185332109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22529294.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 2185332109 is about 46747.5358601927. The cubic root of 2185332109 is about 1297.6945547238.

The spelling of 2185332109 in words is "two billion, one hundred eighty-five million, three hundred thirty-two thousand, one hundred nine".