13131381 has 8 divisors (see below), whose sum is σ = 17569440. Its totient is φ = 8723792.

The previous prime is 13131373. The next prime is 13131401. The reversal of 13131381 is 18313131.

13131381 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13131381 - 2³ = 13131373 is a prime.

It is a super-2 number, since 2×13131381² = 344866333934322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131331) 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 7 ways as a sum of consecutive naturals, for example, 6591 + ... + 8348.

It is an arithmetic number, because the mean of its divisors is an integer number (2196180).

Almost surely, 2^13131381 is an apocalyptic number.

It is an amenable number.

13131381 is a deficient number, since it is larger than the sum of its proper divisors (4438059).

13131381 is a wasteful number, since it uses less digits than its factorization.

13131381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15235.

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

The square root of 13131381 is about 3623.7247412021. The cubic root of 13131381 is about 235.9229196229.

The spelling of 13131381 in words is "thirteen million, one hundred thirty-one thousand, three hundred eighty-one".