2105544015 has 48 divisors (see below), whose sum is σ = 3809878176. Its totient is φ = 1074643200.

The previous prime is 2105543987. The next prime is 2105544017. The reversal of 2105544015 is 5104455012.

2105544015 is a `hidden beast` number, since 2 + 105 + 544 + 0 + 15 = 666.

It is not a de Polignac number, because 2105544015 - 2²⁰ = 2104495439 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2105544015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105544017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 91200 + ... + 111930.

It is an arithmetic number, because the mean of its divisors is an integer number (79372462).

Almost surely, 2^2105544015 is an apocalyptic number.

2105544015 is a deficient number, since it is larger than the sum of its proper divisors (1704334161).

2105544015 is a wasteful number, since it uses less digits than its factorization.

2105544015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20840 (or 20837 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 2105544015 is about 45886.2072413923. The cubic root of 2105544015 is about 1281.7050874677.

Adding to 2105544015 its reverse (5104455012), we get a palindrome (7209999027).

The spelling of 2105544015 in words is "two billion, one hundred five million, five hundred forty-four thousand, fifteen".