2005523 has 6 divisors (see below), whose sum is σ = 2171844. Its totient is φ = 1851096.

The previous prime is 2005519. The next prime is 2005547. The reversal of 2005523 is 3255002.

It is not a de Polignac number, because 2005523 - 2² = 2005519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2005723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5765 + ... + 6102.

It is an arithmetic number, because the mean of its divisors is an integer number (361974).

2^2005523 is an apocalyptic number.

2005523 is a deficient number, since it is larger than the sum of its proper divisors (166321).

2005523 is a wasteful number, since it uses less digits than its factorization.

2005523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11893 (or 11880 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 2005523 is about 1416.1648915292. The cubic root of 2005523 is about 126.1079741299.

The spelling of 2005523 in words is "two million, five thousand, five hundred twenty-three".