30506305 has 12 divisors (see below), whose sum is σ = 38637972. Its totient is φ = 23119200.

The previous prime is 30506299. The next prime is 30506317. The reversal of 30506305 is 50360503.

It can be written as a sum of positive squares in 2 ways, for example, as 24216241 + 6290064 = 4921^2 + 2508^2 .

It is not a de Polignac number, because 30506305 - 2¹³ = 30498113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 6646 + ... + 10255.

It is an arithmetic number, because the mean of its divisors is an integer number (3219831).

Almost surely, 2^30506305 is an apocalyptic number.

It is an amenable number.

30506305 is a deficient number, since it is larger than the sum of its proper divisors (8131667).

30506305 is a wasteful number, since it uses less digits than its factorization.

30506305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16944 (or 16925 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 22.

The square root of 30506305 is about 5523.2513069749. The cubic root of 30506305 is about 312.4615163277.

Adding to 30506305 its reverse (50360503), we get a palindrome (80866808).

The spelling of 30506305 in words is "thirty million, five hundred six thousand, three hundred five".