13531444 has 6 divisors (see below), whose sum is σ = 23680034. Its totient is φ = 6765720.

The previous prime is 13531433. The next prime is 13531451. The reversal of 13531444 is 44413531.

It can be written as a sum of positive squares in only one way, i.e., 7952400 + 5579044 = 2820^2 + 2362^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1691427 + ... + 1691434.

Almost surely, 2^13531444 is an apocalyptic number.

It is an amenable number.

13531444 is a deficient number, since it is larger than the sum of its proper divisors (10148590).

13531444 is a wasteful number, since it uses less digits than its factorization.

13531444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3382865 (or 3382863 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 13531444 is about 3678.5111118495. The cubic root of 13531444 is about 238.2948820011.

Adding to 13531444 its reverse (44413531), we get a palindrome (57944975).

The spelling of 13531444 in words is "thirteen million, five hundred thirty-one thousand, four hundred forty-four".