225540325 has 12 divisors (see below), whose sum is σ = 280688260. Its totient is φ = 179775360.

The previous prime is 225540311. The next prime is 225540331. The reversal of 225540325 is 523045522.

It is a Cunningham number, because it is equal to 15018²+1.

It can be written as a sum of positive squares in 6 ways, for example, as 1 + 225540324 = 1^2 + 15018^2 .

It is not a de Polignac number, because 225540325 - 2¹¹ = 225538277 is a prime.

It is a super-2 number, since 2×225540325² = 101736876402211250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225540293 and 225540302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9360 + ... + 23209.

Almost surely, 2^225540325 is an apocalyptic number.

225540325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225540325 is a deficient number, since it is larger than the sum of its proper divisors (55147935).

225540325 is a wasteful number, since it uses less digits than its factorization.

225540325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32856 (or 32851 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 225540325 is about 15018.0000332934. Note that the first 4 decimals coincide. The cubic root of 225540325 is about 608.7066793532.

Adding to 225540325 its reverse (523045522), we get a palindrome (748585847).

The spelling of 225540325 in words is "two hundred twenty-five million, five hundred forty thousand, three hundred twenty-five".