13131345 has 16 divisors (see below), whose sum is σ = 21735360. Its totient is φ = 6761664.

The previous prime is 13131343. The next prime is 13131359. The reversal of 13131345 is 54313131.

It is not a de Polignac number, because 13131345 - 2¹ = 13131343 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13131341) 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, 14659 + ... + 15528.

It is an arithmetic number, because the mean of its divisors is an integer number (1358460).

Almost surely, 2^13131345 is an apocalyptic number.

13131345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13131345 is a deficient number, since it is larger than the sum of its proper divisors (8604015).

13131345 is a wasteful number, since it uses less digits than its factorization.

13131345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30224.

The product of its digits is 540, while the sum is 21.

The square root of 13131345 is about 3623.7197739340. The cubic root of 13131345 is about 235.9227040266.

Adding to 13131345 its reverse (54313131), we get a palindrome (67444476).

The spelling of 13131345 in words is "thirteen million, one hundred thirty-one thousand, three hundred forty-five".