13455553 has 6 divisors (see below), whose sum is σ = 14201394. Its totient is φ = 12747024.

The previous prime is 13455539. The next prime is 13455577. The reversal of 13455553 is 35555431.

It can be written as a sum of positive squares in only one way, i.e., 12623809 + 831744 = 3553^2 + 912^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13455553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13455053) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18276 + ... + 18997.

It is an arithmetic number, because the mean of its divisors is an integer number (2366899).

Almost surely, 2^13455553 is an apocalyptic number.

It is an amenable number.

13455553 is a deficient number, since it is larger than the sum of its proper divisors (745841).

13455553 is an equidigital number, since it uses as much as digits as its factorization.

13455553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37311 (or 37292 counting only the distinct ones).

The product of its digits is 22500, while the sum is 31.

The square root of 13455553 is about 3668.1811569223. The cubic root of 13455553 is about 237.8485548775.

The spelling of 13455553 in words is "thirteen million, four hundred fifty-five thousand, five hundred fifty-three".