13131340 has 24 divisors (see below), whose sum is σ = 28218960. Its totient is φ = 5130048.

The previous prime is 13131331. The next prime is 13131341. The reversal of 13131340 is 4313131.

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 7 ways as a sum of consecutive naturals, for example, 6775 + ... + 8494.

It is an arithmetic number, because the mean of its divisors is an integer number (1175790).

Almost surely, 2^13131340 is an apocalyptic number.

13131340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13131340 is an abundant number, since it is smaller than the sum of its proper divisors (15087620).

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

13131340 is a wasteful number, since it uses less digits than its factorization.

13131340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15321 (or 15319 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 13131340 is about 3623.7190840351. The cubic root of 13131340 is about 235.9226740826.

Adding to 13131340 its reverse (4313131), we get a palindrome (17444471).

The spelling of 13131340 in words is "thirteen million, one hundred thirty-one thousand, three hundred forty".