13240031 has 4 divisors (see below), whose sum is σ = 15131472. Its totient is φ = 11348592.

The previous prime is 13240021. The next prime is 13240049. The reversal of 13240031 is 13004231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13004231 = 67 ⋅194093.

It is a cyclic number.

It is not a de Polignac number, because 13240031 - 2¹⁴ = 13223647 is a prime.

It is a super-2 number, since 2×13240031² = 350596841761922, 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 = 13239988 and 13240015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13240021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 945710 + ... + 945723.

It is an arithmetic number, because the mean of its divisors is an integer number (3782868).

Almost surely, 2^13240031 is an apocalyptic number.

13240031 is a deficient number, since it is larger than the sum of its proper divisors (1891441).

13240031 is an equidigital number, since it uses as much as digits as its factorization.

13240031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1891440.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 13240031 is about 3638.6853395148. The cubic root of 13240031 is about 236.5718143559.

Adding to 13240031 its reverse (13004231), we get a palindrome (26244262).

The spelling of 13240031 in words is "thirteen million, two hundred forty thousand, thirty-one".