243219 has 16 divisors (see below), whose sum is σ = 362880. Its totient is φ = 144000.

The previous prime is 243209. The next prime is 243227. The reversal of 243219 is 912342.

It is not a de Polignac number, because 243219 - 2⁴ = 243203 is a prime.

It is a super-2 number, since 2×243219² = 118310963922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 243195 and 243204.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 243219.

It is not an unprimeable number, because it can be changed into a prime (243209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844 + ... + 1094.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2²⁴³²¹⁹ is an apocalyptic number.

243219 is a deficient number, since it is larger than the sum of its proper divisors (119661).

243219 is a wasteful number, since it uses less digits than its factorization.

243219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290.

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

The square root of 243219 is about 493.1723836550. The cubic root of 243219 is about 62.4212554972.

The spelling of 243219 in words is "two hundred forty-three thousand, two hundred nineteen".