6444219 has 4 divisors (see below), whose sum is σ = 8592296. Its totient is φ = 4296144.

The previous prime is 6444199. The next prime is 6444233. The reversal of 6444219 is 9124446.

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

It is not a de Polignac number, because 6444219 - 2⁸ = 6443963 is a prime.

It is a super-2 number, since 2×6444219² = 83055917039922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1074034 + ... + 1074039.

It is an arithmetic number, because the mean of its divisors is an integer number (2148074).

Almost surely, 2^6444219 is an apocalyptic number.

6444219 is a deficient number, since it is larger than the sum of its proper divisors (2148077).

6444219 is a wasteful number, since it uses less digits than its factorization.

6444219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148076.

The product of its digits is 6912, while the sum is 30.

The square root of 6444219 is about 2538.5466314409. The cubic root of 6444219 is about 186.0901690222.

The spelling of 6444219 in words is "six million, four hundred forty-four thousand, two hundred nineteen".