243243532 has 48 divisors (see below), whose sum is σ = 505128960. Its totient is φ = 100279872.

The previous prime is 243243523. The next prime is 243243557. The reversal of 243243532 is 235342342.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 243243532.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375633 + ... + 376279.

It is an arithmetic number, because the mean of its divisors is an integer number (10523520).

Almost surely, 2^243243532 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 243243532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (252564480).

243243532 is an abundant number, since it is smaller than the sum of its proper divisors (261885428).

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

243243532 is a wasteful number, since it uses less digits than its factorization.

243243532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1150 (or 1148 counting only the distinct ones).

The product of its digits is 17280, while the sum is 28.

The square root of 243243532 is about 15596.2666045435. The cubic root of 243243532 is about 624.2335410894.

Adding to 243243532 its reverse (235342342), we get a palindrome (478585874).

The spelling of 243243532 in words is "two hundred forty-three million, two hundred forty-three thousand, five hundred thirty-two".