12317131 has 4 divisors (see below), whose sum is σ = 12324600. Its totient is φ = 12309664.

The previous prime is 12317119. The next prime is 12317153. The reversal of 12317131 is 13171321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12317131 - 2⁵ = 12317099 is a prime.

It is a super-2 number, since 2×12317131² = 303423432142322, 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 = 12317099 and 12317108.

It is not an unprimeable number, because it can be changed into a prime (12317101) 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, 46 + ... + 4963.

It is an arithmetic number, because the mean of its divisors is an integer number (3081150).

Almost surely, 2^12317131 is an apocalyptic number.

12317131 is a deficient number, since it is larger than the sum of its proper divisors (7469).

12317131 is an equidigital number, since it uses as much as digits as its factorization.

12317131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7468.

The product of its digits is 126, while the sum is 19.

The square root of 12317131 is about 3509.5770400434. The cubic root of 12317131 is about 230.9421405160.

Adding to 12317131 its reverse (13171321), we get a palindrome (25488452).

It can be divided in two parts, 1 and 2317131, that added together give a palindrome (2317132).

The spelling of 12317131 in words is "twelve million, three hundred seventeen thousand, one hundred thirty-one".