13047131 has 4 divisors (see below), whose sum is σ = 13120200. Its totient is φ = 12974064.

The previous prime is 13047127. The next prime is 13047157. The reversal of 13047131 is 13174031.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 13047131 - 2² = 13047127 is a prime.

It is a super-2 number, since 2×13047131² = 340455254662322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13047101) 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, 36266 + ... + 36623.

It is an arithmetic number, because the mean of its divisors is an integer number (3280050).

Almost surely, 2^13047131 is an apocalyptic number.

13047131 is a deficient number, since it is larger than the sum of its proper divisors (73069).

13047131 is an equidigital number, since it uses as much as digits as its factorization.

13047131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73068.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 13047131 is about 3612.0812560074. The cubic root of 13047131 is about 235.4172818459.

The spelling of 13047131 in words is "thirteen million, forty-seven thousand, one hundred thirty-one".