243253361 has 6 divisors (see below), whose sum is σ = 263404710. Its totient is φ = 224541408.

The previous prime is 243253343. The next prime is 243253393. The reversal of 243253361 is 163352342.

It can be written as a sum of positive squares in 3 ways, for example, as 516961 + 242736400 = 719^2 + 15580^2 .

It is a de Polignac number, because none of the positive numbers 2^k-243253361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243250361) 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, 719516 + ... + 719853.

It is an arithmetic number, because the mean of its divisors is an integer number (43900785).

Almost surely, 2^243253361 is an apocalyptic number.

It is an amenable number.

243253361 is a deficient number, since it is larger than the sum of its proper divisors (20151349).

243253361 is a wasteful number, since it uses less digits than its factorization.

243253361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1439395 (or 1439382 counting only the distinct ones).

The product of its digits is 12960, while the sum is 29.

The square root of 243253361 is about 15596.5817088233. The cubic root of 243253361 is about 624.2419489989.

The spelling of 243253361 in words is "two hundred forty-three million, two hundred fifty-three thousand, three hundred sixty-one".