219138 has 8 divisors (see below), whose sum is σ = 438288. Its totient is φ = 73044.

The previous prime is 219133. The next prime is 219143. The reversal of 219138 is 831912.

It is an interprime number because it is at equal distance from previous prime (219133) and next prime (219143).

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

219138 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 219138.

It is not an unprimeable number, because it can be changed into a prime (219133) 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, 18256 + ... + 18267.

It is an arithmetic number, because the mean of its divisors is an integer number (54786).

2²¹⁹¹³⁸ is an apocalyptic number.

219138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

219138 is a wasteful number, since it uses less digits than its factorization.

219138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36528.

The product of its digits is 432, while the sum is 24.

The square root of 219138 is about 468.1217790276. The cubic root of 219138 is about 60.2891597608.

The spelling of 219138 in words is "two hundred nineteen thousand, one hundred thirty-eight".