13515328 has 14 divisors (see below), whose sum is σ = 26819606. Its totient is φ = 6757632.

The previous prime is 13515319. The next prime is 13515331. The reversal of 13515328 is 82351531.

It can be written as a sum of positive squares in only one way, i.e., 10445824 + 3069504 = 3232^2 + 1752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13515296 and 13515305.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105525 + ... + 105652.

Almost surely, 2^13515328 is an apocalyptic number.

It is an amenable number.

13515328 is a deficient number, since it is larger than the sum of its proper divisors (13304278).

13515328 is an equidigital number, since it uses as much as digits as its factorization.

13515328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211189 (or 211179 counting only the distinct ones).

The product of its digits is 3600, while the sum is 28.

The square root of 13515328 is about 3676.3198990295. The cubic root of 13515328 is about 238.2002410557.

Adding to 13515328 its reverse (82351531), we get a palindrome (95866859).

The spelling of 13515328 in words is "thirteen million, five hundred fifteen thousand, three hundred twenty-eight".