13231391 has 8 divisors (see below), whose sum is σ = 13993200. Its totient is φ = 12476160.

The previous prime is 13231373. The next prime is 13231411. The reversal of 13231391 is 19313231.

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

It is not a de Polignac number, because 13231391 - 2²² = 9037087 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 (13231331) 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, 2831 + ... + 5871.

It is an arithmetic number, because the mean of its divisors is an integer number (1749150).

Almost surely, 2^13231391 is an apocalyptic number.

13231391 is a deficient number, since it is larger than the sum of its proper divisors (761809).

13231391 is a wasteful number, since it uses less digits than its factorization.

13231391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3289.

The product of its digits is 486, while the sum is 23.

The square root of 13231391 is about 3637.4979037795. The cubic root of 13231391 is about 236.5203435487.

The spelling of 13231391 in words is "thirteen million, two hundred thirty-one thousand, three hundred ninety-one".