243253730 has 8 divisors (see below), whose sum is σ = 437856732. Its totient is φ = 97301488.

The previous prime is 243253691. The next prime is 243253757. The reversal of 243253730 is 37352342.

It can be written as a sum of positive squares in 2 ways, for example, as 194909521 + 48344209 = 13961^2 + 6953^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 243253693 and 243253702.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12162677 + ... + 12162696.

Almost surely, 2^243253730 is an apocalyptic number.

243253730 is a deficient number, since it is larger than the sum of its proper divisors (194603002).

243253730 is a wasteful number, since it uses less digits than its factorization.

243253730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24325380.

The product of its (nonzero) digits is 15120, while the sum is 29.

The square root of 243253730 is about 15596.5935383339. The cubic root of 243253730 is about 624.2422646440.

The spelling of 243253730 in words is "two hundred forty-three million, two hundred fifty-three thousand, seven hundred thirty".