243313263 has 6 divisors (see below), whose sum is σ = 351452504. Its totient is φ = 162208836.

The previous prime is 243313241. The next prime is 243313267. The reversal of 243313263 is 362313342.

It is a happy number.

243313263 is a `hidden beast` number, since 2 + 4 + 331 + 326 + 3 = 666.

243313263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243313263 - 2¹⁶ = 243247727 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 (243313267) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13517395 + ... + 13517412.

Almost surely, 2^243313263 is an apocalyptic number.

243313263 is a deficient number, since it is larger than the sum of its proper divisors (108139241).

243313263 is a wasteful number, since it uses less digits than its factorization.

243313263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27034813 (or 27034810 counting only the distinct ones).

The product of its digits is 7776, while the sum is 27.

The square root of 243313263 is about 15598.5019473025. The cubic root of 243313263 is about 624.2931853890.

The spelling of 243313263 in words is "two hundred forty-three million, three hundred thirteen thousand, two hundred sixty-three".