13431553 has 4 divisors (see below), whose sum is σ = 13894740. Its totient is φ = 12968368.

The previous prime is 13431541. The next prime is 13431569. The reversal of 13431553 is 35513431.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10909809 + 2521744 = 3303^2 + 1588^2 .

It is a cyclic number.

It is not a de Polignac number, because 13431553 - 2⁵ = 13431521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13431503) 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, 231550 + ... + 231607.

It is an arithmetic number, because the mean of its divisors is an integer number (3473685).

Almost surely, 2^13431553 is an apocalyptic number.

It is an amenable number.

13431553 is a deficient number, since it is larger than the sum of its proper divisors (463187).

13431553 is an equidigital number, since it uses as much as digits as its factorization.

13431553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463186.

The product of its digits is 2700, while the sum is 25.

The square root of 13431553 is about 3664.9083208179. The cubic root of 13431553 is about 237.7070578417.

Adding to 13431553 its reverse (35513431), we get a palindrome (48944984).

The spelling of 13431553 in words is "thirteen million, four hundred thirty-one thousand, five hundred fifty-three".