2105523 has 24 divisors (see below), whose sum is σ = 3660800. Its totient is φ = 1139184.

The previous prime is 2105513. The next prime is 2105549. The reversal of 2105523 is 3255012.

It is a happy number.

It is not a de Polignac number, because 2105523 - 2⁴ = 2105507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2105496 and 2105505.

It is not an unprimeable number, because it can be changed into a prime (2105503) by changing a digit.

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 in 23 ways as a sum of consecutive naturals, for example, 318 + ... + 2076.

2^2105523 is an apocalyptic number.

2105523 is a deficient number, since it is larger than the sum of its proper divisors (1555277).

2105523 is a wasteful number, since it uses less digits than its factorization.

2105523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1788 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 2105523 is about 1451.0420393634. The cubic root of 2105523 is about 128.1700823309.

It can be divided in two parts, 2105 and 523, that added together give a triangular number (2628 = T₇₂).

The spelling of 2105523 in words is "two million, one hundred five thousand, five hundred twenty-three".