219009 has 8 divisors (see below), whose sum is σ = 333760. Its totient is φ = 125136.

The previous prime is 219001. The next prime is 219017. The reversal of 219009 is 900912.

It is a happy number.

219009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (219001) and next prime (219017).

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

It is not a de Polignac number, because 219009 - 2³ = 219001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10429 = 219009 / (2 + 1 + 9 + 0 + 0 + 9).

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (219001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5194 + ... + 5235.

It is an arithmetic number, because the mean of its divisors is an integer number (41720).

2²¹⁹⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

219009 is a deficient number, since it is larger than the sum of its proper divisors (114751).

219009 is a wasteful number, since it uses less digits than its factorization.

219009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10439.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 219009 is about 467.9839740846. The cubic root of 219009 is about 60.2773272957.

The spelling of 219009 in words is "two hundred nineteen thousand, nine".