304424221 has 8 divisors (see below), whose sum is σ = 316964088. Its totient is φ = 292128000.

The previous prime is 304424203. The next prime is 304424231. The reversal of 304424221 is 122424403.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13039321 + 291384900 = 3611^2 + 17070^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304424221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 304424192 and 304424201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304424231) 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, 58360 + ... + 63361.

It is an arithmetic number, because the mean of its divisors is an integer number (39620511).

Almost surely, 2^304424221 is an apocalyptic number.

It is an amenable number.

304424221 is a deficient number, since it is larger than the sum of its proper divisors (12539867).

304424221 is a wasteful number, since it uses less digits than its factorization.

304424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121823.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 304424221 is about 17447.7569045422. The cubic root of 304424221 is about 672.7077036558.

Adding to 304424221 its reverse (122424403), we get a palindrome (426848624).

The spelling of 304424221 in words is "three hundred four million, four hundred twenty-four thousand, two hundred twenty-one".