2185161 has 16 divisors (see below), whose sum is σ = 3317760. Its totient is φ = 1266320.

The previous prime is 2185151. The next prime is 2185181. The reversal of 2185161 is 1615812.

2185161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2185161 - 2⁷ = 2185033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2185151) 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 15 ways as a sum of consecutive naturals, for example, 681 + ... + 2198.

It is an arithmetic number, because the mean of its divisors is an integer number (207360).

2^2185161 is an apocalyptic number.

It is an amenable number.

2185161 is a deficient number, since it is larger than the sum of its proper divisors (1132599).

2185161 is a wasteful number, since it uses less digits than its factorization.

2185161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2916.

The product of its digits is 480, while the sum is 24.

The square root of 2185161 is about 1478.2290079687. The cubic root of 2185161 is about 129.7660684508.

It can be divided in two parts, 21851 and 61, that added together give a palindrome (21912).

The spelling of 2185161 in words is "two million, one hundred eighty-five thousand, one hundred sixty-one".