2113161 has 16 divisors (see below), whose sum is σ = 2999040. Its totient is φ = 1319760.

The previous prime is 2113159. The next prime is 2113187. The reversal of 2113161 is 1613112.

It is not a de Polignac number, because 2113161 - 2¹ = 2113159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113161.

It is not an unprimeable number, because it can be changed into a prime (2113361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7326 + ... + 7608.

It is an arithmetic number, because the mean of its divisors is an integer number (187440).

2^2113161 is an apocalyptic number.

It is an amenable number.

2113161 is a deficient number, since it is larger than the sum of its proper divisors (885879).

2113161 is a wasteful number, since it uses less digits than its factorization.

2113161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436.

The product of its digits is 36, while the sum is 15.

The square root of 2113161 is about 1453.6715585028. The cubic root of 2113161 is about 128.3248786619.

Adding to 2113161 its reverse (1613112), we get a palindrome (3726273).

The spelling of 2113161 in words is "two million, one hundred thirteen thousand, one hundred sixty-one".