13641553 has 4 divisors (see below), whose sum is σ = 14234688. Its totient is φ = 13048420.

The previous prime is 13641539. The next prime is 13641557. The reversal of 13641553 is 35514631.

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 13641553 - 2⁵ = 13641521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13641557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296533 + ... + 296578.

It is an arithmetic number, because the mean of its divisors is an integer number (3558672).

Almost surely, 2^13641553 is an apocalyptic number.

It is an amenable number.

13641553 is a deficient number, since it is larger than the sum of its proper divisors (593135).

13641553 is an equidigital number, since it uses as much as digits as its factorization.

13641553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593134.

The product of its digits is 5400, while the sum is 28.

The square root of 13641553 is about 3693.4473057024. The cubic root of 13641553 is about 238.9394932117.

The spelling of 13641553 in words is "thirteen million, six hundred forty-one thousand, five hundred fifty-three".