243340566 has 48 divisors (see below), whose sum is σ = 585681840. Its totient is φ = 67126080.

The previous prime is 243340553. The next prime is 243340597. The reversal of 243340566 is 665043342.

It is a super-2 number, since 2×243340566² = 118429262122400712, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5745 + ... + 22796.

It is an arithmetic number, because the mean of its divisors is an integer number (12201705).

Almost surely, 2^243340566 is an apocalyptic number.

243340566 is an abundant number, since it is smaller than the sum of its proper divisors (342341274).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243340566 is a wasteful number, since it uses less digits than its factorization.

243340566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28589 (or 28582 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 33.

The square root of 243340566 is about 15599.3771029487. The cubic root of 243340566 is about 624.3165358619.

The spelling of 243340566 in words is "two hundred forty-three million, three hundred forty thousand, five hundred sixty-six".