13131318 has 32 divisors (see below), whose sum is σ = 27820800. Its totient is φ = 4120416.

The previous prime is 13131317. The next prime is 13131319. The reversal of 13131318 is 81313131.

13131318 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13131317) and next prime (13131319).

It is a junction number, because it is equal to n+sod(n) for n = 13131294 and 13131303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131317) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25855 + ... + 26357.

It is an arithmetic number, because the mean of its divisors is an integer number (869400).

Almost surely, 2^13131318 is an apocalyptic number.

13131318 is an abundant number, since it is smaller than the sum of its proper divisors (14689482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13131318 is a wasteful number, since it uses less digits than its factorization.

13131318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756.

The product of its digits is 216, while the sum is 21.

The square root of 13131318 is about 3623.7160484784. The cubic root of 13131318 is about 235.9225423291.

Adding to 13131318 its reverse (81313131), we get a palindrome (94444449).

The spelling of 13131318 in words is "thirteen million, one hundred thirty-one thousand, three hundred eighteen".