219444055 has 4 divisors (see below), whose sum is σ = 263332872. Its totient is φ = 175555240.

The previous prime is 219444047. The next prime is 219444061. The reversal of 219444055 is 550444912.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 219444055 - 2³ = 219444047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 219444055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21944401 + ... + 21944410.

It is an arithmetic number, because the mean of its divisors is an integer number (65833218).

Almost surely, 2^219444055 is an apocalyptic number.

219444055 is a deficient number, since it is larger than the sum of its proper divisors (43888817).

219444055 is an equidigital number, since it uses as much as digits as its factorization.

219444055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43888816.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 219444055 is about 14813.6442174098. The cubic root of 219444055 is about 603.1721394782.

Adding to 219444055 its reverse (550444912), we get a palindrome (769888967).

The spelling of 219444055 in words is "two hundred nineteen million, four hundred forty-four thousand, fifty-five".