13381553 has 4 divisors (see below), whose sum is σ = 13813248. Its totient is φ = 12949860.

The previous prime is 13381549. The next prime is 13381597. The reversal of 13381553 is 35518331.

13381553 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13381553 - 2² = 13381549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13381523) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 215801 + ... + 215862.

It is an arithmetic number, because the mean of its divisors is an integer number (3453312).

Almost surely, 2^13381553 is an apocalyptic number.

It is an amenable number.

13381553 is a deficient number, since it is larger than the sum of its proper divisors (431695).

13381553 is an equidigital number, since it uses as much as digits as its factorization.

13381553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431694.

The product of its digits is 5400, while the sum is 29.

The square root of 13381553 is about 3658.0805075886. The cubic root of 13381553 is about 237.4117300783.

Adding to 13381553 its reverse (35518331), we get a palindrome (48899884).

The spelling of 13381553 in words is "thirteen million, three hundred eighty-one thousand, five hundred fifty-three".