55388219 has 2 divisors, whose sum is σ = 55388220. Its totient is φ = 55388218.

The previous prime is 55388189. The next prime is 55388269. The reversal of 55388219 is 91288355.

55388219 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55388219 - 2⁸ = 55387963 is a prime.

It is a super-2 number, since 2×55388219² = 6135709607983922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (55388269) 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 as a sum of consecutive naturals, namely, 27694109 + 27694110.

It is an arithmetic number, because the mean of its divisors is an integer number (27694110).

Almost surely, 2^55388219 is an apocalyptic number.

55388219 is a deficient number, since it is larger than the sum of its proper divisors (1).

55388219 is an equidigital number, since it uses as much as digits as its factorization.

55388219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400, while the sum is 41.

The square root of 55388219 is about 7442.3261820482. The cubic root of 55388219 is about 381.1879238177.

The spelling of 55388219 in words is "fifty-five million, three hundred eighty-eight thousand, two hundred nineteen".