305040243 has 8 divisors (see below), whose sum is σ = 406845648. Its totient is φ = 203297504.

The previous prime is 305040233. The next prime is 305040257. The reversal of 305040243 is 342040503.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 305040243 - 2¹⁰ = 305039219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (305040233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2796 + ... + 24857.

It is an arithmetic number, because the mean of its divisors is an integer number (50855706).

Almost surely, 2^305040243 is an apocalyptic number.

305040243 is a deficient number, since it is larger than the sum of its proper divisors (101805405).

305040243 is a wasteful number, since it uses less digits than its factorization.

305040243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31333.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 305040243 is about 17465.4013123089. The cubic root of 305040243 is about 673.1611537065.

Adding to 305040243 its reverse (342040503), we get a palindrome (647080746).

The spelling of 305040243 in words is "three hundred five million, forty thousand, two hundred forty-three".