225125225 has 24 divisors (see below), whose sum is σ = 301360920. Its totient is φ = 165841920.

The previous prime is 225125189. The next prime is 225125227. The reversal of 225125225 is 522521522.

225125225 = T₁₂₉ + T₁₃₀ + ... + T₁₁₀₅.

It can be written as a sum of positive squares in 12 ways, for example, as 87086224 + 138039001 = 9332^2 + 11749^2 .

It is not a de Polignac number, because 225125225 - 2¹² = 225121129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225125194 and 225125203.

It is not an unprimeable number, because it can be changed into a prime (225125227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 229937 + ... + 230913.

It is an arithmetic number, because the mean of its divisors is an integer number (12556705).

Almost surely, 2^225125225 is an apocalyptic number.

225125225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225125225 is a deficient number, since it is larger than the sum of its proper divisors (76235695).

225125225 is a wasteful number, since it uses less digits than its factorization.

225125225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1709 (or 1704 counting only the distinct ones).

The product of its digits is 4000, while the sum is 26.

The square root of 225125225 is about 15004.1735860393. The cubic root of 225125225 is about 608.3330147410. Note that the first 3 decimals are identical.

Adding to 225125225 its reverse (522521522), we get a palindrome (747646747).

The spelling of 225125225 in words is "two hundred twenty-five million, one hundred twenty-five thousand, two hundred twenty-five".