243213223 has 16 divisors (see below), whose sum is σ = 268934400. Its totient is φ = 218116800.

The previous prime is 243213209. The next prime is 243213239. The reversal of 243213223 is 322312342.

It is not a de Polignac number, because 243213223 - 2¹³ = 243205031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 243213194 and 243213203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243213263) 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, 299488 + ... + 300298.

It is an arithmetic number, because the mean of its divisors is an integer number (16808400).

Almost surely, 2^243213223 is an apocalyptic number.

243213223 is a deficient number, since it is larger than the sum of its proper divisors (25721177).

243213223 is a wasteful number, since it uses less digits than its factorization.

243213223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158.

The product of its digits is 1728, while the sum is 22.

The square root of 243213223 is about 15595.2948994240. The cubic root of 243213223 is about 624.2076127805.

Adding to 243213223 its reverse (322312342), we get a palindrome (565525565).

The spelling of 243213223 in words is "two hundred forty-three million, two hundred thirteen thousand, two hundred twenty-three".