13105523 has 4 divisors (see below), whose sum is σ = 13148520. Its totient is φ = 13062528.

The previous prime is 13105507. The next prime is 13105537. The reversal of 13105523 is 32550131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32550131 = 941 ⋅34591.

It is a cyclic number.

It is not a de Polignac number, because 13105523 - 2⁴ = 13105507 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13105495 and 13105504.

It is not an unprimeable number, because it can be changed into a prime (13105123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21038 + ... + 21651.

It is an arithmetic number, because the mean of its divisors is an integer number (3287130).

Almost surely, 2^13105523 is an apocalyptic number.

13105523 is a deficient number, since it is larger than the sum of its proper divisors (42997).

13105523 is an equidigital number, since it uses as much as digits as its factorization.

13105523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42996.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 13105523 is about 3620.1551071743. The cubic root of 13105523 is about 235.7679599489.

Adding to 13105523 its reverse (32550131), we get a palindrome (45655654).

The spelling of 13105523 in words is "thirteen million, one hundred five thousand, five hundred twenty-three".