243252541 has 32 divisors (see below), whose sum is σ = 305862912. Its totient is φ = 188697600.

The previous prime is 243252533. The next prime is 243252553. The reversal of 243252541 is 145252342.

It is not a de Polignac number, because 243252541 - 2³ = 243252533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243252241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 444430 + ... + 444976.

It is an arithmetic number, because the mean of its divisors is an integer number (9558216).

Almost surely, 2^243252541 is an apocalyptic number.

It is an amenable number.

243252541 is a deficient number, since it is larger than the sum of its proper divisors (62610371).

243252541 is a wasteful number, since it uses less digits than its factorization.

243252541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 709.

The product of its digits is 9600, while the sum is 28.

The square root of 243252541 is about 15596.5554209896. Note that the first 3 decimals coincide. The cubic root of 243252541 is about 624.2412475643.

The spelling of 243252541 in words is "two hundred forty-three million, two hundred fifty-two thousand, five hundred forty-one".