13181071 has 4 divisors (see below), whose sum is σ = 13348000. Its totient is φ = 13014144.

The previous prime is 13181057. The next prime is 13181083. The reversal of 13181071 is 17018131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13181071 - 2¹⁹ = 12656783 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 (13181771) 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, 83346 + ... + 83503.

It is an arithmetic number, because the mean of its divisors is an integer number (3337000).

Almost surely, 2^13181071 is an apocalyptic number.

13181071 is a deficient number, since it is larger than the sum of its proper divisors (166929).

13181071 is an equidigital number, since it uses as much as digits as its factorization.

13181071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166928.

The product of its (nonzero) digits is 168, while the sum is 22.

The square root of 13181071 is about 3630.5744724492. The cubic root of 13181071 is about 236.2201276116.

The spelling of 13181071 in words is "thirteen million, one hundred eighty-one thousand, seventy-one".