13828531 has 4 divisors (see below), whose sum is σ = 14641992. Its totient is φ = 13015072.

The previous prime is 13828513. The next prime is 13828559. The reversal of 13828531 is 13582831.

13828531 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13828531 is a prime.

It is a super-2 number, since 2×13828531² = 382456539235922, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13828493 and 13828502.

It is not an unprimeable number, because it can be changed into a prime (13828571) 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 in 3 ways as a sum of consecutive naturals, for example, 406705 + ... + 406738.

It is an arithmetic number, because the mean of its divisors is an integer number (3660498).

Almost surely, 2^13828531 is an apocalyptic number.

13828531 is a deficient number, since it is larger than the sum of its proper divisors (813461).

13828531 is an equidigital number, since it uses as much as digits as its factorization.

13828531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813460.

The product of its digits is 5760, while the sum is 31.

The square root of 13828531 is about 3718.6732849230. The cubic root of 13828531 is about 240.0262182006.

The spelling of 13828531 in words is "thirteen million, eight hundred twenty-eight thousand, five hundred thirty-one".