25305225 has 48 divisors (see below), whose sum is σ = 46931520. Its totient is φ = 11923200.

The previous prime is 25305211. The next prime is 25305227. The reversal of 25305225 is 52250352.

It is not a de Polignac number, because 25305225 - 2⁷ = 25305097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25305195 and 25305204.

It is not an unprimeable number, because it can be changed into a prime (25305227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30111 + ... + 30939.

It is an arithmetic number, because the mean of its divisors is an integer number (977740).

Almost surely, 2^25305225 is an apocalyptic number.

25305225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25305225 is a deficient number, since it is larger than the sum of its proper divisors (21626295).

25305225 is a wasteful number, since it uses less digits than its factorization.

25305225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890 (or 885 counting only the distinct ones).

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

The square root of 25305225 is about 5030.4299021058. The cubic root of 25305225 is about 293.5869413434.

Adding to 25305225 its reverse (52250352), we get a palindrome (77555577).

It can be divided in two parts, 25305 and 225, that multiplied together give a triangular number (5693625 = T₃₃₇₄).

The spelling of 25305225 in words is "twenty-five million, three hundred five thousand, two hundred twenty-five".