55145005 has 4 divisors (see below), whose sum is σ = 66174012. Its totient is φ = 44116000.

The previous prime is 55144997. The next prime is 55145021. The reversal of 55145005 is 50054155.

55145005 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 can be written as a sum of positive squares in 2 ways, for example, as 26275876 + 28869129 = 5126^2 + 5373^2 .

It is not a de Polignac number, because 55145005 - 2³ = 55144997 is a prime.

It is a Duffinian number.

It is a congruent 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, 5514496 + ... + 5514505.

It is an arithmetic number, because the mean of its divisors is an integer number (16543503).

Almost surely, 2^55145005 is an apocalyptic number.

It is an amenable number.

55145005 is a deficient number, since it is larger than the sum of its proper divisors (11029007).

55145005 is a wasteful number, since it uses less digits than its factorization.

55145005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11029006.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 55145005 is about 7425.9682870317. The cubic root of 55145005 is about 380.6291631721.

The spelling of 55145005 in words is "fifty-five million, one hundred forty-five thousand, five".