243222685 has 4 divisors (see below), whose sum is σ = 291867228. Its totient is φ = 194578144.

The previous prime is 243222659. The next prime is 243222691. The reversal of 243222685 is 586222342.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 586222342 = 2 ⋅293111171.

It can be written as a sum of positive squares in 2 ways, for example, as 109265209 + 133957476 = 10453^2 + 11574^2 .

It is a cyclic number.

It is not a de Polignac number, because 243222685 - 2⁷ = 243222557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243222685.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24322264 + ... + 24322273.

It is an arithmetic number, because the mean of its divisors is an integer number (72966807).

Almost surely, 2^243222685 is an apocalyptic number.

It is an amenable number.

243222685 is a deficient number, since it is larger than the sum of its proper divisors (48644543).

243222685 is an equidigital number, since it uses as much as digits as its factorization.

243222685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48644542.

The product of its digits is 46080, while the sum is 34.

The square root of 243222685 is about 15595.5982572007. The cubic root of 243222685 is about 624.2157074279.

The spelling of 243222685 in words is "two hundred forty-three million, two hundred twenty-two thousand, six hundred eighty-five".