2161107 has 32 divisors (see below), whose sum is σ = 3548160. Its totient is φ = 1291680.

The previous prime is 2161087. The next prime is 2161121. The reversal of 2161107 is 7011612.

It is not a de Polignac number, because 2161107 - 2¹⁶ = 2095571 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2161107.

It is not an unprimeable number, because it can be changed into a prime (2161127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16432 + ... + 16562.

It is an arithmetic number, because the mean of its divisors is an integer number (110880).

2^2161107 is an apocalyptic number.

2161107 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2161107 is a deficient number, since it is larger than the sum of its proper divisors (1387053).

2161107 is a wasteful number, since it uses less digits than its factorization.

2161107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 84, while the sum is 18.

The square root of 2161107 is about 1470.0704064772. The cubic root of 2161107 is about 129.2881605861.

Adding to 2161107 its reverse (7011612), we get a palindrome (9172719).

The spelling of 2161107 in words is "two million, one hundred sixty-one thousand, one hundred seven".