13118523 has 16 divisors (see below), whose sum is σ = 19155072. Its totient is φ = 7920000.

The previous prime is 13118519. The next prime is 13118537. The reversal of 13118523 is 32581131.

It is not a de Polignac number, because 13118523 - 2² = 13118519 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13118493 and 13118502.

It is not an unprimeable number, because it can be changed into a prime (13118513) 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 15 ways as a sum of consecutive naturals, for example, 10323 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (1197192).

Almost surely, 2^13118523 is an apocalyptic number.

13118523 is a deficient number, since it is larger than the sum of its proper divisors (6036549).

13118523 is a wasteful number, since it uses less digits than its factorization.

13118523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its digits is 720, while the sum is 24.

The square root of 13118523 is about 3621.9501653115. The cubic root of 13118523 is about 235.8458907216.

Adding to 13118523 its reverse (32581131), we get a palindrome (45699654).

The spelling of 13118523 in words is "thirteen million, one hundred eighteen thousand, five hundred twenty-three".