13131244 has 12 divisors (see below), whose sum is σ = 26262544. Its totient is φ = 5627664.

The previous prime is 13131241. The next prime is 13131257. The reversal of 13131244 is 44213131.

13131244 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (13131241) 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, 234459 + ... + 234514.

Almost surely, 2^13131244 is an apocalyptic number.

13131244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13131244 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13131244 is a wasteful number, since it uses less digits than its factorization.

13131244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468984 (or 468982 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 13131244 is about 3623.7058379510. The cubic root of 13131244 is about 235.9220991570.

Adding to 13131244 its reverse (44213131), we get a palindrome (57344375).

It can be divided in two parts, 131 and 31244, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 13131244 in words is "thirteen million, one hundred thirty-one thousand, two hundred forty-four".