2185813 has 8 divisors (see below), whose sum is σ = 2539520. Its totient is φ = 1842480.

The previous prime is 2185801. The next prime is 2185853. The reversal of 2185813 is 3185812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2185813 - 2²¹ = 88661 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 (2185853) 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, 2133 + ... + 2986.

It is an arithmetic number, because the mean of its divisors is an integer number (317440).

2^2185813 is an apocalyptic number.

It is an amenable number.

2185813 is a deficient number, since it is larger than the sum of its proper divisors (353707).

2185813 is an equidigital number, since it uses as much as digits as its factorization.

2185813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5187.

The product of its digits is 1920, while the sum is 28.

The square root of 2185813 is about 1478.4495256856. The cubic root of 2185813 is about 129.7789735354.

Subtracting 2185813 from its reverse (3185812), we obtain a palindrome (999999).

The spelling of 2185813 in words is "two million, one hundred eighty-five thousand, eight hundred thirteen".