13551553 has 4 divisors (see below), whose sum is σ = 13627440. Its totient is φ = 13475668.

The previous prime is 13551529. The next prime is 13551563. The reversal of 13551553 is 35515531.

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 13551553 - 2¹⁷ = 13420481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13551523) 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, 37675 + ... + 38032.

It is an arithmetic number, because the mean of its divisors is an integer number (3406860).

Almost surely, 2^13551553 is an apocalyptic number.

It is an amenable number.

13551553 is a deficient number, since it is larger than the sum of its proper divisors (75887).

13551553 is an equidigital number, since it uses as much as digits as its factorization.

13551553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75886.

The product of its digits is 5625, while the sum is 28.

The square root of 13551553 is about 3681.2434040688. The cubic root of 13551553 is about 238.4128664531.

The spelling of 13551553 in words is "thirteen million, five hundred fifty-one thousand, five hundred fifty-three".