2013523 has 4 divisors (see below), whose sum is σ = 2051568. Its totient is φ = 1975480.

The previous prime is 2013511. The next prime is 2013533. The reversal of 2013523 is 3253102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2013523 - 2⁵ = 2013491 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2013497 and 2013506.

It is not an unprimeable number, because it can be changed into a prime (2013533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18943 + ... + 19048.

It is an arithmetic number, because the mean of its divisors is an integer number (512892).

2^2013523 is an apocalyptic number.

2013523 is a deficient number, since it is larger than the sum of its proper divisors (38045).

2013523 is an equidigital number, since it uses as much as digits as its factorization.

2013523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38044.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 2013523 is about 1418.9866102258. The cubic root of 2013523 is about 126.2754325785.

Adding to 2013523 its reverse (3253102), we get a palindrome (5266625).

The spelling of 2013523 in words is "two million, thirteen thousand, five hundred twenty-three".