13521315 has 16 divisors (see below), whose sum is σ = 21859488. Its totient is φ = 7136256.

The previous prime is 13521283. The next prime is 13521323. The reversal of 13521315 is 51312531.

13521315 is nontrivially palindromic in base 13.

13521315 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13521315 - 2⁵ = 13521283 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 13521291 and 13521300.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3192 + ... + 6101.

It is an arithmetic number, because the mean of its divisors is an integer number (1366218).

Almost surely, 2^13521315 is an apocalyptic number.

13521315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13521315 is a deficient number, since it is larger than the sum of its proper divisors (8338173).

13521315 is an equidigital number, since it uses as much as digits as its factorization.

13521315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9398.

The product of its digits is 450, while the sum is 21.

The square root of 13521315 is about 3677.1340742486. The cubic root of 13521315 is about 238.2354083936.

Adding to 13521315 its reverse (51312531), we get a palindrome (64833846).

The spelling of 13521315 in words is "thirteen million, five hundred twenty-one thousand, three hundred fifteen".