225146225 has 6 divisors (see below), whose sum is σ = 279181350. Its totient is φ = 180116960.

The previous prime is 225146203. The next prime is 225146231. The reversal of 225146225 is 522641522.

It can be written as a sum of positive squares in 3 ways, for example, as 3225616 + 221920609 = 1796^2 + 14897^2 .

It is not a de Polignac number, because 225146225 - 2¹⁰ = 225145201 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 4502900 + ... + 4502949.

It is an arithmetic number, because the mean of its divisors is an integer number (46530225).

Almost surely, 2^225146225 is an apocalyptic number.

225146225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225146225 is a deficient number, since it is larger than the sum of its proper divisors (54035125).

225146225 is an equidigital number, since it uses as much as digits as its factorization.

225146225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9005859 (or 9005854 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 225146225 is about 15004.8733750072. The cubic root of 225146225 is about 608.3519295414.

Adding to 225146225 its reverse (522641522), we get a palindrome (747787747).

The spelling of 225146225 in words is "two hundred twenty-five million, one hundred forty-six thousand, two hundred twenty-five".