2103855 has 16 divisors (see below), whose sum is σ = 3625440. Its totient is φ = 1035648.

The previous prime is 2103839. The next prime is 2103859. The reversal of 2103855 is 5583012.

It is not a de Polignac number, because 2103855 - 2⁴ = 2103839 is a prime.

It is a super-2 number, since 2×2103855² = 8852411722050, which contains 22 as substring.

2103855 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103859) 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, 5200 + ... + 5589.

It is an arithmetic number, because the mean of its divisors is an integer number (226590).

2^2103855 is an apocalyptic number.

2103855 is a deficient number, since it is larger than the sum of its proper divisors (1521585).

2103855 is a wasteful number, since it uses less digits than its factorization.

2103855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10810.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 2103855 is about 1450.4671661227. The cubic root of 2103855 is about 128.1362278481.

Adding to 2103855 its reverse (5583012), we get a palindrome (7686867).

The spelling of 2103855 in words is "two million, one hundred three thousand, eight hundred fifty-five".