243371253 has 4 divisors (see below), whose sum is σ = 324495008. Its totient is φ = 162247500.

The previous prime is 243371231. The next prime is 243371267. The reversal of 243371253 is 352173342.

243371253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 243371253 - 2⁹ = 243370741 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243371253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243371753) 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, 40561873 + ... + 40561878.

It is an arithmetic number, because the mean of its divisors is an integer number (81123752).

Almost surely, 2^243371253 is an apocalyptic number.

It is an amenable number.

243371253 is a deficient number, since it is larger than the sum of its proper divisors (81123755).

243371253 is an equidigital number, since it uses as much as digits as its factorization.

243371253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81123754.

The product of its digits is 15120, while the sum is 30.

The square root of 243371253 is about 15600.3606689076. The cubic root of 243371253 is about 624.3427783645.

The spelling of 243371253 in words is "two hundred forty-three million, three hundred seventy-one thousand, two hundred fifty-three".