30440213 has 2 divisors, whose sum is σ = 30440214. Its totient is φ = 30440212.

The previous prime is 30440209. The next prime is 30440239. The reversal of 30440213 is 31204403.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20052484 + 10387729 = 4478^2 + 3223^2 .

It is a cyclic number.

It is not a de Polignac number, because 30440213 - 2² = 30440209 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30440191 and 30440200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30440513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15220106 + 15220107.

It is an arithmetic number, because the mean of its divisors is an integer number (15220107).

Almost surely, 2^30440213 is an apocalyptic number.

It is an amenable number.

30440213 is a deficient number, since it is larger than the sum of its proper divisors (1).

30440213 is an equidigital number, since it uses as much as digits as its factorization.

30440213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30440213 is about 5517.2649927296. The cubic root of 30440213 is about 312.2357035747.

Adding to 30440213 its reverse (31204403), we get a palindrome (61644616).

The spelling of 30440213 in words is "thirty million, four hundred forty thousand, two hundred thirteen".