30320525 has 12 divisors (see below), whose sum is σ = 38515764. Its totient is φ = 23664000.

The previous prime is 30320471. The next prime is 30320531. The reversal of 30320525 is 52502303.

It can be written as a sum of positive squares in 6 ways, for example, as 2579236 + 27741289 = 1606^2 + 5267^2 .

It is a de Polignac number, because none of the positive numbers 2^k-30320525 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30320497 and 30320506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13766 + ... + 15815.

It is an arithmetic number, because the mean of its divisors is an integer number (3209647).

Almost surely, 2^30320525 is an apocalyptic number.

It is an amenable number.

30320525 is a deficient number, since it is larger than the sum of its proper divisors (8195239).

30320525 is a wasteful number, since it uses less digits than its factorization.

30320525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29632 (or 29627 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 20.

The square root of 30320525 is about 5506.4076311149. The cubic root of 30320525 is about 311.8259390995.

Adding to 30320525 its reverse (52502303), we get a palindrome (82822828).

The spelling of 30320525 in words is "thirty million, three hundred twenty thousand, five hundred twenty-five".