55220005 has 4 divisors (see below), whose sum is σ = 66264012. Its totient is φ = 44176000.

The previous prime is 55220003. The next prime is 55220059. The reversal of 55220005 is 50002255.

55220005 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, and also an emirpimes, since its reverse is a distinct semiprime: 50002255 = 5 ⋅10000451.

It can be written as a sum of positive squares in 2 ways, for example, as 21846276 + 33373729 = 4674^2 + 5777^2 .

It is not a de Polignac number, because 55220005 - 2¹ = 55220003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55220003) by changing a digit.

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, 5521996 + ... + 5522005.

It is an arithmetic number, because the mean of its divisors is an integer number (16566003).

Almost surely, 2^55220005 is an apocalyptic number.

It is an amenable number.

55220005 is a deficient number, since it is larger than the sum of its proper divisors (11044007).

55220005 is a wasteful number, since it uses less digits than its factorization.

55220005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11044006.

The product of its (nonzero) digits is 500, while the sum is 19.

The square root of 55220005 is about 7431.0164176915. The cubic root of 55220005 is about 380.8016433157.

The spelling of 55220005 in words is "fifty-five million, two hundred twenty thousand, five".