2185164 has 24 divisors (see below), whose sum is σ = 5665520. Its totient is φ = 728352.

The previous prime is 2185151. The next prime is 2185181. The reversal of 2185164 is 4615812.

2185164 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10009 + ... + 10224.

2^2185164 is an apocalyptic number.

It is an amenable number.

2185164 is an abundant number, since it is smaller than the sum of its proper divisors (3480356).

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

2185164 is a wasteful number, since it uses less digits than its factorization.

2185164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20246 (or 20238 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 2185164 is about 1478.2300226961. The cubic root of 2185164 is about 129.7661278359.

The spelling of 2185164 in words is "two million, one hundred eighty-five thousand, one hundred sixty-four".