243521052 has 12 divisors (see below), whose sum is σ = 568215816. Its totient is φ = 81173680.

The previous prime is 243521051. The next prime is 243521077. The reversal of 243521052 is 250125342.

243521052 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243521051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10146699 + ... + 10146722.

It is an arithmetic number, because the mean of its divisors is an integer number (47351318).

Almost surely, 2^243521052 is an apocalyptic number.

It is an amenable number.

243521052 is an abundant number, since it is smaller than the sum of its proper divisors (324694764).

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

243521052 is a wasteful number, since it uses less digits than its factorization.

243521052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20293428 (or 20293426 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 243521052 is about 15605.1610693386. The cubic root of 243521052 is about 624.4708498333.

Adding to 243521052 its reverse (250125342), we get a palindrome (493646394).

The spelling of 243521052 in words is "two hundred forty-three million, five hundred twenty-one thousand, fifty-two".