13031244 has 18 divisors (see below), whose sum is σ = 32940180. Its totient is φ = 4343736.

The previous prime is 13031243. The next prime is 13031261. The reversal of 13031244 is 44213031.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (13031243) 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 5 ways as a sum of consecutive naturals, for example, 180954 + ... + 181025.

It is an arithmetic number, because the mean of its divisors is an integer number (1830010).

Almost surely, 2^13031244 is an apocalyptic number.

It is an amenable number.

13031244 is an abundant number, since it is smaller than the sum of its proper divisors (19908936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13031244 is a wasteful number, since it uses less digits than its factorization.

13031244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361989 (or 361984 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13031244 is about 3609.8814384963. The cubic root of 13031244 is about 235.3216901169.

Adding to 13031244 its reverse (44213031), we get a palindrome (57244275).

The spelling of 13031244 in words is "thirteen million, thirty-one thousand, two hundred forty-four".