243190 has 16 divisors (see below), whose sum is σ = 444528. Its totient is φ = 95776.

The previous prime is 243167. The next prime is 243197. The reversal of 243190 is 91342.

It is a super-2 number, since 2×243190² = 118282752200, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243197) by changing a digit.

243190 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 684 + ... + 976.

It is an arithmetic number, because the mean of its divisors is an integer number (27783).

2²⁴³¹⁹⁰ is an apocalyptic number.

243190 is a deficient number, since it is larger than the sum of its proper divisors (201338).

243190 is a wasteful number, since it uses less digits than its factorization.

243190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 243190 is about 493.1429812945. The cubic root of 243190 is about 62.4187744844.

The spelling of 243190 in words is "two hundred forty-three thousand, one hundred ninety".