219423 has 4 divisors (see below), whose sum is σ = 292568. Its totient is φ = 146280.

The previous prime is 219409. The next prime is 219433. The reversal of 219423 is 324912.

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

It is not a de Polignac number, because 219423 - 2⁴ = 219407 is a prime.

It is a D-number.

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 219423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (219433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36568 + ... + 36573.

It is an arithmetic number, because the mean of its divisors is an integer number (73142).

2²¹⁹⁴²³ is an apocalyptic number.

219423 is a deficient number, since it is larger than the sum of its proper divisors (73145).

219423 is an equidigital number, since it uses as much as digits as its factorization.

219423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73144.

The product of its digits is 432, while the sum is 21.

The square root of 219423 is about 468.4260880865. The cubic root of 219423 is about 60.3152848008.

It can be divided in two parts, 21942 and 3, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 219423 in words is "two hundred nineteen thousand, four hundred twenty-three".