219442 has 4 divisors (see below), whose sum is σ = 329166. Its totient is φ = 109720.

The previous prime is 219437. The next prime is 219451. The reversal of 219442 is 244912.

219442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 151321 + 68121 = 389^2 + 261^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

219442 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54859 + ... + 54862.

2²¹⁹⁴⁴² is an apocalyptic number.

219442 is a deficient number, since it is larger than the sum of its proper divisors (109724).

219442 is a wasteful number, since it uses less digits than its factorization.

219442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109723.

The product of its digits is 576, while the sum is 22.

The square root of 219442 is about 468.4463683283. The cubic root of 219442 is about 60.3170256656.

The spelling of 219442 in words is "two hundred nineteen thousand, four hundred forty-two".