243243566 has 8 divisors (see below), whose sum is σ = 365125320. Its totient is φ = 121535128.

The previous prime is 243243557. The next prime is 243243569. The reversal of 243243566 is 665342342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243243569) 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, 39761 + ... + 45468.

It is an arithmetic number, because the mean of its divisors is an integer number (45640665).

Almost surely, 2^243243566 is an apocalyptic number.

243243566 is a deficient number, since it is larger than the sum of its proper divisors (121881754).

243243566 is a wasteful number, since it uses less digits than its factorization.

243243566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86658.

The product of its digits is 103680, while the sum is 35.

The square root of 243243566 is about 15596.2676945479. The cubic root of 243243566 is about 624.2335701740.

The spelling of 243243566 in words is "two hundred forty-three million, two hundred forty-three thousand, five hundred sixty-six".