2161110 has 64 divisors (see below), whose sum is σ = 6096384. Its totient is φ = 480000.

The previous prime is 2161087. The next prime is 2161121. The reversal of 2161110 is 111612.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8485 + ... + 8735.

It is an arithmetic number, because the mean of its divisors is an integer number (95256).

2^2161110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2161110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3048192).

2161110 is an abundant number, since it is smaller than the sum of its proper divisors (3935274).

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

2161110 is a wasteful number, since it uses less digits than its factorization.

2161110 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309.

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 2161110 is about 1470.0714268361. The cubic root of 2161110 is about 129.2882204110.

Adding to 2161110 its reverse (111612), we get a palindrome (2272722).

It can be divided in two parts, 216 and 1110, that added together give a triangular number (1326 = T₅₁).

The spelling of 2161110 in words is "two million, one hundred sixty-one thousand, one hundred ten".