13131311 has 4 divisors (see below), whose sum is σ = 13174392. Its totient is φ = 13088232.

The previous prime is 13131281. The next prime is 13131317. The reversal of 13131311 is 11313131.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11313131 = 491 ⋅23041.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13131311 is a prime.

It is a Duffinian number.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21080 + ... + 21693.

It is an arithmetic number, because the mean of its divisors is an integer number (3293598).

Almost surely, 2^13131311 is an apocalyptic number.

13131311 is a deficient number, since it is larger than the sum of its proper divisors (43081).

13131311 is an equidigital number, since it uses as much as digits as its factorization.

13131311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43080.

The product of its digits is 27, while the sum is 14.

The square root of 13131311 is about 3623.7150826189. The cubic root of 13131311 is about 235.9225004075.

Adding to 13131311 its reverse (11313131), we get a palindrome (24444442).

The spelling of 13131311 in words is "thirteen million, one hundred thirty-one thousand, three hundred eleven".