30205025 has 12 divisors (see below), whose sum is σ = 37650492. Its totient is φ = 24037440.

The previous prime is 30205009. The next prime is 30205027. The reversal of 30205025 is 52050203.

It can be written as a sum of positive squares in 6 ways, for example, as 6507601 + 23697424 = 2551^2 + 4868^2 .

It is not a de Polignac number, because 30205025 - 2⁴ = 30205009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30204994 and 30205012.

It is not an unprimeable number, because it can be changed into a prime (30205027) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1859 + ... + 7991.

It is an arithmetic number, because the mean of its divisors is an integer number (3137541).

Almost surely, 2^30205025 is an apocalyptic number.

It is an amenable number.

30205025 is a deficient number, since it is larger than the sum of its proper divisors (7445467).

30205025 is a wasteful number, since it uses less digits than its factorization.

30205025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6340 (or 6335 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 17.

The square root of 30205025 is about 5495.9098427831. The cubic root of 30205025 is about 311.4294890074.

Adding to 30205025 its reverse (52050203), we get a palindrome (82255228).

The spelling of 30205025 in words is "thirty million, two hundred five thousand, twenty-five".