13213504 has 14 divisors (see below), whose sum is σ = 26220674. Its totient is φ = 6606720.

The previous prime is 13213481. The next prime is 13213507. The reversal of 13213504 is 40531231.

It can be written as a sum of positive squares in only one way, i.e., 10497600 + 2715904 = 3240^2 + 1648^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213507) 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 as a sum of consecutive naturals, namely, 103167 + ... + 103294.

Almost surely, 2^13213504 is an apocalyptic number.

It is an amenable number.

13213504 is a deficient number, since it is larger than the sum of its proper divisors (13007170).

13213504 is an equidigital number, since it uses as much as digits as its factorization.

13213504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206473 (or 206463 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 13213504 is about 3635.0383766888. The cubic root of 13213504 is about 236.4137146178.

Adding to 13213504 its reverse (40531231), we get a palindrome (53744735).

The spelling of 13213504 in words is "thirteen million, two hundred thirteen thousand, five hundred four".