243403263 has 24 divisors (see below), whose sum is σ = 380931408. Its totient is φ = 149167872.

The previous prime is 243403241. The next prime is 243403327. The reversal of 243403263 is 362304342.

It is a happy number.

It is not a de Polignac number, because 243403263 - 2⁸ = 243403007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243403063) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11920 + ... + 25077.

It is an arithmetic number, because the mean of its divisors is an integer number (15872142).

Almost surely, 2^243403263 is an apocalyptic number.

243403263 is a deficient number, since it is larger than the sum of its proper divisors (137528145).

243403263 is a wasteful number, since it uses less digits than its factorization.

243403263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37063 (or 37060 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 27.

The square root of 243403263 is about 15601.3865729941. The cubic root of 243403263 is about 624.3701499021.

The spelling of 243403263 in words is "two hundred forty-three million, four hundred three thousand, two hundred sixty-three".