2161116 has 36 divisors (see below), whose sum is σ = 5510232. Its totient is φ = 714144.

The previous prime is 2161087. The next prime is 2161121. The reversal of 2161116 is 6111612.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6055 + ... + 6401.

It is an arithmetic number, because the mean of its divisors is an integer number (153062).

2^2161116 is an apocalyptic number.

It is an amenable number.

2161116 is an abundant number, since it is smaller than the sum of its proper divisors (3349116).

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

2161116 is a wasteful number, since it uses less digits than its factorization.

2161116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530 (or 525 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 2161116 is about 1470.0734675519. The cubic root of 2161116 is about 129.2883400607.

Adding to 2161116 its reverse (6111612), we get a palindrome (8272728).

The spelling of 2161116 in words is "two million, one hundred sixty-one thousand, one hundred sixteen".