304042221 has 48 divisors (see below), whose sum is σ = 538312320. Its totient is φ = 166129920.

The previous prime is 304042213. The next prime is 304042241. The reversal of 304042221 is 122240403.

It is not a de Polignac number, because 304042221 - 2³ = 304042213 is a prime.

It is a super-2 number, since 2×304042221² = 184883344301225682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 304042194 and 304042203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304042241) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 98461 + ... + 101501.

It is an arithmetic number, because the mean of its divisors is an integer number (11214840).

Almost surely, 2^304042221 is an apocalyptic number.

It is an amenable number.

304042221 is a deficient number, since it is larger than the sum of its proper divisors (234270099).

304042221 is a wasteful number, since it uses less digits than its factorization.

304042221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3103 (or 3074 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 304042221 is about 17436.8065023387. The cubic root of 304042221 is about 672.4262084196.

Adding to 304042221 its reverse (122240403), we get a palindrome (426282624).

The spelling of 304042221 in words is "three hundred four million, forty-two thousand, two hundred twenty-one".