13557443 has 4 divisors (see below), whose sum is σ = 13632528. Its totient is φ = 13482360.

The previous prime is 13557437. The next prime is 13557451. The reversal of 13557443 is 34475531.

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

It is a cyclic number.

It is not a de Polignac number, because 13557443 - 2¹⁰ = 13556419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13557473) 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, 37271 + ... + 37632.

It is an arithmetic number, because the mean of its divisors is an integer number (3408132).

Almost surely, 2^13557443 is an apocalyptic number.

13557443 is a deficient number, since it is larger than the sum of its proper divisors (75085).

13557443 is an equidigital number, since it uses as much as digits as its factorization.

13557443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75084.

The product of its digits is 25200, while the sum is 32.

The square root of 13557443 is about 3682.0433185936. The cubic root of 13557443 is about 238.4474024305.

The spelling of 13557443 in words is "thirteen million, five hundred fifty-seven thousand, four hundred forty-three".