25530225 has 36 divisors (see below), whose sum is σ = 49108464. Its totient is φ = 11669280.

The previous prime is 25530191. The next prime is 25530247. The reversal of 25530225 is 52203552.

It is not a de Polignac number, because 25530225 - 2¹³ = 25522033 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25530195 and 25530204.

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 35 ways as a sum of consecutive naturals, for example, 202 + ... + 7148.

It is an arithmetic number, because the mean of its divisors is an integer number (1364124).

Almost surely, 2^25530225 is an apocalyptic number.

25530225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25530225 is a deficient number, since it is larger than the sum of its proper divisors (23578239).

25530225 is a wasteful number, since it uses less digits than its factorization.

25530225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6974 (or 6962 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 25530225 is about 5052.7443038412. The cubic root of 25530225 is about 294.4545123992.

Adding to 25530225 its reverse (52203552), we get a palindrome (77733777).

The spelling of 25530225 in words is "twenty-five million, five hundred thirty thousand, two hundred twenty-five".