13131447 has 8 divisors (see below), whose sum is σ = 20009856. Its totient is φ = 7503672.

The previous prime is 13131421. The next prime is 13131449. The reversal of 13131447 is 74413131.

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

It is not a de Polignac number, because 13131447 - 2⁷ = 13131319 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 312633 + ... + 312674.

It is an arithmetic number, because the mean of its divisors is an integer number (2501232).

Almost surely, 2^13131447 is an apocalyptic number.

13131447 is a deficient number, since it is larger than the sum of its proper divisors (6878409).

13131447 is an equidigital number, since it uses as much as digits as its factorization.

13131447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625317.

The product of its digits is 1008, while the sum is 24.

The square root of 13131447 is about 3623.7338478426. The cubic root of 13131447 is about 235.9233148819.

Adding to 13131447 its reverse (74413131), we get a palindrome (87544578).

The spelling of 13131447 in words is "thirteen million, one hundred thirty-one thousand, four hundred forty-seven".