219139 has 4 divisors (see below), whose sum is σ = 226240. Its totient is φ = 212040.

The previous prime is 219133. The next prime is 219143. The reversal of 219139 is 931912.

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

It is not a de Polignac number, because 219139 - 2⁹ = 218627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (219133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3504 + ... + 3565.

It is an arithmetic number, because the mean of its divisors is an integer number (56560).

2²¹⁹¹³⁹ is an apocalyptic number.

219139 is a deficient number, since it is larger than the sum of its proper divisors (7101).

219139 is an equidigital number, since it uses as much as digits as its factorization.

219139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7100.

The product of its digits is 486, while the sum is 25.

The square root of 219139 is about 468.1228471246. The cubic root of 219139 is about 60.2892514672.

The spelling of 219139 in words is "two hundred nineteen thousand, one hundred thirty-nine".