55133555 has 4 divisors (see below), whose sum is σ = 66160272. Its totient is φ = 44106840.

The previous prime is 55133549. The next prime is 55133579. The reversal of 55133555 is 55533155.

55133555 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 55133555 - 2¹⁰ = 55132531 is a prime.

It is a Duffinian number.

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, 5513351 + ... + 5513360.

It is an arithmetic number, because the mean of its divisors is an integer number (16540068).

Almost surely, 2^55133555 is an apocalyptic number.

55133555 is a deficient number, since it is larger than the sum of its proper divisors (11026717).

55133555 is a wasteful number, since it uses less digits than its factorization.

55133555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026716.

The product of its digits is 28125, while the sum is 32.

The square root of 55133555 is about 7425.1973037758. The cubic root of 55133555 is about 380.6028174460.

The spelling of 55133555 in words is "fifty-five million, one hundred thirty-three thousand, five hundred fifty-five".