2105216 has 16 divisors (see below), whose sum is σ = 4194240. Its totient is φ = 1052544.

The previous prime is 2105209. The next prime is 2105231. The reversal of 2105216 is 6125012.

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2105194 and 2105203.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8096 + ... + 8351.

It is an arithmetic number, because the mean of its divisors is an integer number (262140).

2^2105216 is an apocalyptic number.

It is an amenable number.

2105216 is a deficient number, since it is larger than the sum of its proper divisors (2089024).

2105216 is an equidigital number, since it uses as much as digits as its factorization.

2105216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16461 (or 16449 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2105216 is about 1450.9362494610. The cubic root of 2105216 is about 128.1638526629.

The spelling of 2105216 in words is "two million, one hundred five thousand, two hundred sixteen".