13117231 has 2 divisors, whose sum is σ = 13117232. Its totient is φ = 13117230.

The previous prime is 13117211. The next prime is 13117241. The reversal of 13117231 is 13271131.

13117231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13117231 - 2⁷ = 13117103 is a prime.

It is a super-2 number, since 2×13117231² = 344123498214722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13117199 and 13117208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13117211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6558615 + 6558616.

It is an arithmetic number, because the mean of its divisors is an integer number (6558616).

Almost surely, 2^13117231 is an apocalyptic number.

13117231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13117231 is an equidigital number, since it uses as much as digits as its factorization.

13117231 is an evil number, because the sum of its binary digits is even.

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

The square root of 13117231 is about 3621.7718039656. The cubic root of 13117231 is about 235.8381479065.

Adding to 13117231 its reverse (13271131), we get a palindrome (26388362).

The spelling of 13117231 in words is "thirteen million, one hundred seventeen thousand, two hundred thirty-one".