225400025 has 12 divisors (see below), whose sum is σ = 295937532. Its totient is φ = 169712640.

The previous prime is 225400013. The next prime is 225400027. The reversal of 225400025 is 520004522.

It can be written as a sum of positive squares in 6 ways, for example, as 7778521 + 217621504 = 2789^2 + 14752^2 .

It is not a de Polignac number, because 225400025 - 2⁴ = 225400009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225400027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264752 + ... + 265601.

It is an arithmetic number, because the mean of its divisors is an integer number (24661461).

Almost surely, 2^225400025 is an apocalyptic number.

225400025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225400025 is a deficient number, since it is larger than the sum of its proper divisors (70537507).

225400025 is a wasteful number, since it uses less digits than its factorization.

225400025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530380 (or 530375 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 225400025 is about 15013.3282452626. The cubic root of 225400025 is about 608.5804354667.

Adding to 225400025 its reverse (520004522), we get a palindrome (745404547).

The spelling of 225400025 in words is "two hundred twenty-five million, four hundred thousand, twenty-five".