304214321 has 4 divisors (see below), whose sum is σ = 314704500. Its totient is φ = 293724144.

The previous prime is 304214297. The next prime is 304214327. The reversal of 304214321 is 123412403.

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 172791025 + 131423296 = 13145^2 + 11464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304214321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 304214293 and 304214302.

It is not an unprimeable number, because it can be changed into a prime (304214327) 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, 5245046 + ... + 5245103.

It is an arithmetic number, because the mean of its divisors is an integer number (78676125).

Almost surely, 2^304214321 is an apocalyptic number.

It is an amenable number.

304214321 is a deficient number, since it is larger than the sum of its proper divisors (10490179).

304214321 is a wasteful number, since it uses less digits than its factorization.

304214321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10490178.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 304214321 is about 17441.7407674808. The cubic root of 304214321 is about 672.5530578224.

Adding to 304214321 its reverse (123412403), we get a palindrome (427626724).

The spelling of 304214321 in words is "three hundred four million, two hundred fourteen thousand, three hundred twenty-one".