304213 has 8 divisors (see below), whose sum is σ = 374528. Its totient is φ = 240624.

The previous prime is 304211. The next prime is 304217. The reversal of 304213 is 312403.

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

It is a cyclic number.

It is not a de Polignac number, because 304213 - 2¹ = 304211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

304213 is a lucky number.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 304193 and 304202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304211) 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, 1581 + ... + 1762.

It is an arithmetic number, because the mean of its divisors is an integer number (46816).

2³⁰⁴²¹³ is an apocalyptic number.

It is an amenable number.

304213 is a deficient number, since it is larger than the sum of its proper divisors (70315).

304213 is a wasteful number, since it uses less digits than its factorization.

304213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3363.

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 304213 is about 551.5550743126. Note that the first 3 decimals coincide. The cubic root of 304213 is about 67.2552084338.

Adding to 304213 its reverse (312403), we get a palindrome (616616).

The spelling of 304213 in words is "three hundred four thousand, two hundred thirteen".