13131320 has 16 divisors (see below), whose sum is σ = 29545560. Its totient is φ = 5252512.

The previous prime is 13131319. The next prime is 13131329. The reversal of 13131320 is 2313131.

It is a junction number, because it is equal to n+sod(n) for n = 13131295 and 13131304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131329) 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 3 ways as a sum of consecutive naturals, for example, 164102 + ... + 164181.

Almost surely, 2^13131320 is an apocalyptic number.

13131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131320 is an abundant number, since it is smaller than the sum of its proper divisors (16414240).

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

13131320 is a wasteful number, since it uses less digits than its factorization.

13131320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328294 (or 328290 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 13131320 is about 3623.7163244382. The cubic root of 13131320 is about 235.9225543067.

Adding to 13131320 its reverse (2313131), we get a palindrome (15444451).

The spelling of 13131320 in words is "thirteen million, one hundred thirty-one thousand, three hundred twenty".