243435253 has 4 divisors (see below), whose sum is σ = 243470988. Its totient is φ = 243399520.

The previous prime is 243435221. The next prime is 243435263. The reversal of 243435253 is 352534342.

243435253 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 an emirpimes, since its reverse is a distinct semiprime: 352534342 = 2 ⋅176267171.

It can be written as a sum of positive squares in 2 ways, for example, as 189530289 + 53904964 = 13767^2 + 7342^2 .

It is a cyclic number.

It is not a de Polignac number, because 243435253 - 2⁵ = 243435221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243435263) 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, 4126 + ... + 22447.

It is an arithmetic number, because the mean of its divisors is an integer number (60867747).

Almost surely, 2^243435253 is an apocalyptic number.

It is an amenable number.

243435253 is a deficient number, since it is larger than the sum of its proper divisors (35735).

243435253 is an equidigital number, since it uses as much as digits as its factorization.

243435253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35734.

The product of its digits is 43200, while the sum is 31.

The square root of 243435253 is about 15602.4117686978. The cubic root of 243435253 is about 624.3975019404.

Adding to 243435253 its reverse (352534342), we get a palindrome (595969595).

The spelling of 243435253 in words is "two hundred forty-three million, four hundred thirty-five thousand, two hundred fifty-three".