243775265 has 4 divisors (see below), whose sum is σ = 292530324. Its totient is φ = 195020208.

The previous prime is 243775261. The next prime is 243775271. The reversal of 243775265 is 562577342.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 76020961 + 167754304 = 8719^2 + 12952^2 .

It is a cyclic number.

It is not a de Polignac number, because 243775265 - 2² = 243775261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243775261) 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, 24377522 + ... + 24377531.

It is an arithmetic number, because the mean of its divisors is an integer number (73132581).

Almost surely, 2^243775265 is an apocalyptic number.

It is an amenable number.

243775265 is a deficient number, since it is larger than the sum of its proper divisors (48755059).

243775265 is an equidigital number, since it uses as much as digits as its factorization.

243775265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48755058.

The product of its digits is 352800, while the sum is 41.

The square root of 243775265 is about 15613.3041025915. The cubic root of 243775265 is about 624.6880704792.

The spelling of 243775265 in words is "two hundred forty-three million, seven hundred seventy-five thousand, two hundred sixty-five".