13805555 has 4 divisors (see below), whose sum is σ = 16566672. Its totient is φ = 11044440.

The previous prime is 13805531. The next prime is 13805593. The reversal of 13805555 is 55550831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55550831 = 7 ⋅7935833.

It is not a de Polignac number, because 13805555 - 2¹⁶ = 13740019 is a prime.

It is a Duffinian number.

13805555 is a modest number, since divided by 5555 gives 1380 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1380551 + ... + 1380560.

It is an arithmetic number, because the mean of its divisors is an integer number (4141668).

Almost surely, 2^13805555 is an apocalyptic number.

13805555 is a deficient number, since it is larger than the sum of its proper divisors (2761117).

13805555 is an equidigital number, since it uses as much as digits as its factorization.

13805555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761116.

The product of its (nonzero) digits is 15000, while the sum is 32.

The square root of 13805555 is about 3715.5827268411. The cubic root of 13805555 is about 239.8932105923.

The spelling of 13805555 in words is "thirteen million, eight hundred five thousand, five hundred fifty-five".