25351225 has 27 divisors (see below), whose sum is σ = 33814893. Its totient is φ = 18851040.

The previous prime is 25351223. The next prime is 25351289. The reversal of 25351225 is 52215352.

It is a happy number.

The square root of 25351225 is 5035.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 190969 + 25160256 = 437^2 + 5016^2 .

It is not a de Polignac number, because 25351225 - 2¹ = 25351223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25351225.

It is not an unprimeable number, because it can be changed into a prime (25351223) by changing a digit.

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 26 ways as a sum of consecutive naturals, for example, 478299 + ... + 478351.

Almost surely, 2^25351225 is an apocalyptic number.

25351225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

25351225 is the 5035-th square number.

25351225 is the 2518-th centered octagonal number.

It is an amenable number.

25351225 is a deficient number, since it is larger than the sum of its proper divisors (8463668).

25351225 is an equidigital number, since it uses as much as digits as its factorization.

25351225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 77 counting only the distinct ones).

The product of its digits is 3000, while the sum is 25.

The cubic root of 25351225 is about 293.7647283999.

Multiplying 25351225 by its sum of digits (25), we get a square (633780625 = 25175²).

25351225 divided by its sum of digits (25) gives a square (1014049 = 1007²).

Adding to 25351225 its reverse (52215352), we get a palindrome (77566577).

The spelling of 25351225 in words is "twenty-five million, three hundred fifty-one thousand, two hundred twenty-five".