13071381 has 4 divisors (see below), whose sum is σ = 17428512. Its totient is φ = 8714252.

The previous prime is 13071371. The next prime is 13071413. The reversal of 13071381 is 18317031.

13071381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13071381 - 2¹⁰ = 13070357 is a prime.

It is a super-2 number, since 2×13071381² = 341722002494322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13071301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178561 + ... + 2178566.

It is an arithmetic number, because the mean of its divisors is an integer number (4357128).

Almost surely, 2^13071381 is an apocalyptic number.

It is an amenable number.

13071381 is a deficient number, since it is larger than the sum of its proper divisors (4357131).

13071381 is an equidigital number, since it uses as much as digits as its factorization.

13071381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4357130.

The product of its (nonzero) digits is 504, while the sum is 24.

The square root of 13071381 is about 3615.4364881712. The cubic root of 13071381 is about 235.5630440524.

The spelling of 13071381 in words is "thirteen million, seventy-one thousand, three hundred eighty-one".