30005525 has 12 divisors (see below), whose sum is σ = 40589664. Its totient is φ = 21822000.

The previous prime is 30005519. The next prime is 30005533. The reversal of 30005525 is 52550003.

It is not a de Polignac number, because 30005525 - 2¹⁰ = 30004501 is a prime.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30005497 and 30005506.

It is a congruent 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, 54281 + ... + 54830.

It is an arithmetic number, because the mean of its divisors is an integer number (3382472).

Almost surely, 2^30005525 is an apocalyptic number.

It is an amenable number.

30005525 is a deficient number, since it is larger than the sum of its proper divisors (10584139).

30005525 is a wasteful number, since it uses less digits than its factorization.

30005525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109132 (or 109127 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 20.

The square root of 30005525 is about 5477.7299130205. The cubic root of 30005525 is about 310.7423243796.

Adding to 30005525 its reverse (52550003), we get a palindrome (82555528).

The spelling of 30005525 in words is "thirty million, five thousand, five hundred twenty-five".