13180831 has 4 divisors (see below), whose sum is σ = 13956192. Its totient is φ = 12405472.

The previous prime is 13180829. The next prime is 13180837. The reversal of 13180831 is 13808131.

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 13180831 - 2¹ = 13180829 is a prime.

It is a super-2 number, since 2×13180831² = 347468611701122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13180796 and 13180805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13180837) 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, 387655 + ... + 387688.

It is an arithmetic number, because the mean of its divisors is an integer number (3489048).

Almost surely, 2^13180831 is an apocalyptic number.

13180831 is a deficient number, since it is larger than the sum of its proper divisors (775361).

13180831 is an equidigital number, since it uses as much as digits as its factorization.

13180831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775360.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 13180831 is about 3630.5414196783. The cubic root of 13180831 is about 236.2186939098.

Adding to 13180831 its reverse (13808131), we get a palindrome (26988962).

The spelling of 13180831 in words is "thirteen million, one hundred eighty thousand, eight hundred thirty-one".