13440553 has 12 divisors (see below), whose sum is σ = 16001040. Its totient is φ = 11250792.

The previous prime is 13440551. The next prime is 13440563. The reversal of 13440553 is 35504431.

It is not a de Polignac number, because 13440553 - 2¹ = 13440551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13440551) 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 11 ways as a sum of consecutive naturals, for example, 1083 + ... + 5296.

It is an arithmetic number, because the mean of its divisors is an integer number (1333420).

Almost surely, 2^13440553 is an apocalyptic number.

It is an amenable number.

13440553 is a deficient number, since it is larger than the sum of its proper divisors (2560487).

13440553 is an equidigital number, since it uses as much as digits as its factorization.

13440553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6436 (or 6429 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 13440553 is about 3666.1359767472. The cubic root of 13440553 is about 237.7601389674.

Adding to 13440553 its reverse (35504431), we get a palindrome (48944984).

The spelling of 13440553 in words is "thirteen million, four hundred forty thousand, five hundred fifty-three".