55055215 has 8 divisors (see below), whose sum is σ = 68938848. Its totient is φ = 42129120.

The previous prime is 55055191. The next prime is 55055219. The reversal of 55055215 is 51255055.

It is a happy number.

55055215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55055215 - 2¹³ = 55047023 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 (55055219) 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 7 ways as a sum of consecutive naturals, for example, 239256 + ... + 239485.

It is an arithmetic number, because the mean of its divisors is an integer number (8617356).

Almost surely, 2^55055215 is an apocalyptic number.

55055215 is a deficient number, since it is larger than the sum of its proper divisors (13883633).

55055215 is a wasteful number, since it uses less digits than its factorization.

55055215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478769.

The product of its (nonzero) digits is 6250, while the sum is 28.

The square root of 55055215 is about 7419.9201478183. The cubic root of 55055215 is about 380.4224641321.

The spelling of 55055215 in words is "fifty-five million, fifty-five thousand, two hundred fifteen".