305442213 has 32 divisors (see below), whose sum is σ = 444165120. Its totient is φ = 185982720.

The previous prime is 305442211. The next prime is 305442229. The reversal of 305442213 is 312244503.

It is not a de Polignac number, because 305442213 - 2¹ = 305442211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305442211) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241978 + ... + 243236.

It is an arithmetic number, because the mean of its divisors is an integer number (13880160).

Almost surely, 2^305442213 is an apocalyptic number.

It is an amenable number.

305442213 is a deficient number, since it is larger than the sum of its proper divisors (138722907).

305442213 is a wasteful number, since it uses less digits than its factorization.

305442213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1417.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 305442213 is about 17476.9051322023. The cubic root of 305442213 is about 673.4567123245.

Adding to 305442213 its reverse (312244503), we get a palindrome (617686716).

The spelling of 305442213 in words is "three hundred five million, four hundred forty-two thousand, two hundred thirteen".