304140213 has 12 divisors (see below), whose sum is σ = 473107180. Its totient is φ = 187163136.

The previous prime is 304140203. The next prime is 304140227. The reversal of 304140213 is 312041403.

It can be written as a sum of positive squares in 2 ways, for example, as 163788804 + 140351409 = 12798^2 + 11847^2 .

It is not a de Polignac number, because 304140213 - 2¹² = 304136117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304140203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1299628 + ... + 1299861.

Almost surely, 2^304140213 is an apocalyptic number.

It is an amenable number.

304140213 is a deficient number, since it is larger than the sum of its proper divisors (168966967).

304140213 is a wasteful number, since it uses less digits than its factorization.

304140213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2599508 (or 2599505 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 304140213 is about 17439.6161941712. The cubic root of 304140213 is about 672.4984410535.

Adding to 304140213 its reverse (312041403), we get a palindrome (616181616).

The spelling of 304140213 in words is "three hundred four million, one hundred forty thousand, two hundred thirteen".