55018555 has 4 divisors (see below), whose sum is σ = 66022272. Its totient is φ = 44014840.

The previous prime is 55018549. The next prime is 55018573. The reversal of 55018555 is 55581055.

It is a happy number.

55018555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55018555 - 2⁷ = 55018427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55018555.

It is an unprimeable number.

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, 5501851 + ... + 5501860.

It is an arithmetic number, because the mean of its divisors is an integer number (16505568).

Almost surely, 2^55018555 is an apocalyptic number.

55018555 is a deficient number, since it is larger than the sum of its proper divisors (11003717).

55018555 is a wasteful number, since it uses less digits than its factorization.

55018555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11003716.

The product of its (nonzero) digits is 25000, while the sum is 34.

The square root of 55018555 is about 7417.4493594496. The cubic root of 55018555 is about 380.3380071969.

Subtracting 55018555 from its reverse (55581055), we obtain a square (562500 = 750²).

The spelling of 55018555 in words is "fifty-five million, eighteen thousand, five hundred fifty-five".