243022312 has 48 divisors (see below), whose sum is σ = 517984740. Its totient is φ = 106244352.

The previous prime is 243022229. The next prime is 243022313. The reversal of 243022312 is 213220342.

It can be written as a sum of positive squares in 2 ways, for example, as 211818916 + 31203396 = 14554^2 + 5586^2 .

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 243022312.

It is not an unprimeable number, because it can be changed into a prime (243022313) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34308 + ... + 40780.

Almost surely, 2^243022312 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243022312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (258992370).

243022312 is an abundant number, since it is smaller than the sum of its proper divisors (274962428).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243022312 is a wasteful number, since it uses less digits than its factorization.

243022312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6507 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 243022312 is about 15589.1729094266. The cubic root of 243022312 is about 624.0442454382.

Adding to 243022312 its reverse (213220342), we get a palindrome (456242654).

It can be divided in two parts, 2430 and 22312, that added together give a palindrome (24742).

The spelling of 243022312 in words is "two hundred forty-three million, twenty-two thousand, three hundred twelve".