25305530 has 16 divisors (see below), whose sum is σ = 47947680. Its totient is φ = 9589392.

The previous prime is 25305529. The next prime is 25305541. The reversal of 25305530 is 3550352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25305496 and 25305505.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66404 + ... + 66783.

It is an arithmetic number, because the mean of its divisors is an integer number (2996730).

Almost surely, 2^25305530 is an apocalyptic number.

25305530 is a deficient number, since it is larger than the sum of its proper divisors (22642150).

25305530 is a wasteful number, since it uses less digits than its factorization.

25305530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133213.

The product of its (nonzero) digits is 2250, while the sum is 23.

The square root of 25305530 is about 5030.4602175149. The cubic root of 25305530 is about 293.5881208582.

Adding to 25305530 its reverse (3550352), we get a palindrome (28855882).

The spelling of 25305530 in words is "twenty-five million, three hundred five thousand, five hundred thirty".