304320243 has 4 divisors (see below), whose sum is σ = 405760328. Its totient is φ = 202880160.

The previous prime is 304320239. The next prime is 304320251. The reversal of 304320243 is 342023403.

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

It is not a de Polignac number, because 304320243 - 2² = 304320239 is a prime.

It is a super-2 number, since 2×304320243² = 185221620599158098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (304320293) 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, 50720038 + ... + 50720043.

It is an arithmetic number, because the mean of its divisors is an integer number (101440082).

Almost surely, 2^304320243 is an apocalyptic number.

304320243 is a deficient number, since it is larger than the sum of its proper divisors (101440085).

304320243 is a wasteful number, since it uses less digits than its factorization.

304320243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101440084.

The product of its (nonzero) digits is 1728, while the sum is 21.

The square root of 304320243 is about 17444.7769547220. The cubic root of 304320243 is about 672.6311057573.

Adding to 304320243 its reverse (342023403), we get a palindrome (646343646).

The spelling of 304320243 in words is "three hundred four million, three hundred twenty thousand, two hundred forty-three".