13017231 has 6 divisors (see below), whose sum is σ = 18802680. Its totient is φ = 8678148.

The previous prime is 13017209. The next prime is 13017239. The reversal of 13017231 is 13271031.

It is not a de Polignac number, because 13017231 - 2⁹ = 13016719 is a prime.

It is a super-2 number, since 2×13017231² = 338896605814722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13017239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 723171 + ... + 723188.

It is an arithmetic number, because the mean of its divisors is an integer number (3133780).

Almost surely, 2^13017231 is an apocalyptic number.

13017231 is a deficient number, since it is larger than the sum of its proper divisors (5785449).

13017231 is a wasteful number, since it uses less digits than its factorization.

13017231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446365 (or 1446362 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 18.

The square root of 13017231 is about 3607.9399939578. The cubic root of 13017231 is about 235.2373096963.

Adding to 13017231 its reverse (13271031), we get a palindrome (26288262).

The spelling of 13017231 in words is "thirteen million, seventeen thousand, two hundred thirty-one".