243364253 has 4 divisors (see below), whose sum is σ = 265488288. Its totient is φ = 221240220.

The previous prime is 243364249. The next prime is 243364267. The reversal of 243364253 is 352463342.

243364253 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 a cyclic number.

It is not a de Polignac number, because 243364253 - 2² = 243364249 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 (243364273) 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, 11062001 + ... + 11062022.

It is an arithmetic number, because the mean of its divisors is an integer number (66372072).

Almost surely, 2^243364253 is an apocalyptic number.

It is an amenable number.

243364253 is a deficient number, since it is larger than the sum of its proper divisors (22124035).

243364253 is a wasteful number, since it uses less digits than its factorization.

243364253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22124034.

The product of its digits is 51840, while the sum is 32.

The square root of 243364253 is about 15600.1363135070. The cubic root of 243364253 is about 624.3367923913.

The spelling of 243364253 in words is "two hundred forty-three million, three hundred sixty-four thousand, two hundred fifty-three".