243243252 has 72 divisors (see below), whose sum is σ = 717080000. Its totient is φ = 69494544.

The previous prime is 243243251. The next prime is 243243281. The reversal of 243243252 is 252342342.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2499 + ... + 22197.

Almost surely, 2^243243252 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 243243252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (358540000).

243243252 is an abundant number, since it is smaller than the sum of its proper divisors (473836748).

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

243243252 is a wasteful number, since it uses less digits than its factorization.

243243252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19730 (or 19711 counting only the distinct ones).

The product of its digits is 11520, while the sum is 27.

The square root of 243243252 is about 15596.2576280337. The cubic root of 243243252 is about 624.2333015689.

Adding to 243243252 its reverse (252342342), we get a palindrome (495585594).

The spelling of 243243252 in words is "two hundred forty-three million, two hundred forty-three thousand, two hundred fifty-two".