25812225 has 36 divisors (see below), whose sum is σ = 46788300. Its totient is φ = 13601280.

The previous prime is 25812209. The next prime is 25812277. The reversal of 25812225 is 52221852.

It can be written as a sum of positive squares in 6 ways, for example, as 501264 + 25310961 = 708^2 + 5031^2 .

It is not a de Polignac number, because 25812225 - 2⁴ = 25812209 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 19381 + ... + 20669.

It is an arithmetic number, because the mean of its divisors is an integer number (1299675).

Almost surely, 2^25812225 is an apocalyptic number.

25812225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25812225 is a deficient number, since it is larger than the sum of its proper divisors (20976075).

25812225 is a wasteful number, since it uses less digits than its factorization.

25812225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1394 (or 1386 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 25812225 is about 5080.5732944226. The cubic root of 25812225 is about 295.5347000744.

The spelling of 25812225 in words is "twenty-five million, eight hundred twelve thousand, two hundred twenty-five".