55550215 has 16 divisors (see below), whose sum is σ = 76887360. Its totient is φ = 37739520.

The previous prime is 55550213. The next prime is 55550263. The reversal of 55550215 is 51205555.

It is a happy number.

55550215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55550215 - 2¹ = 55550213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55550213) 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 15 ways as a sum of consecutive naturals, for example, 3466 + ... + 11095.

It is an arithmetic number, because the mean of its divisors is an integer number (4805460).

Almost surely, 2^55550215 is an apocalyptic number.

55550215 is a deficient number, since it is larger than the sum of its proper divisors (21337145).

55550215 is a wasteful number, since it uses less digits than its factorization.

55550215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14682.

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

The square root of 55550215 is about 7453.2016610313. The cubic root of 55550215 is about 381.5591869726.

The spelling of 55550215 in words is "fifty-five million, five hundred fifty thousand, two hundred fifteen".