225020225 has 6 divisors (see below), whose sum is σ = 279025110. Its totient is φ = 180016160.

The previous prime is 225020219. The next prime is 225020261. The reversal of 225020225 is 522020522.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 57032704 + 167987521 = 7552^2 + 12961^2 .

It is not a de Polignac number, because 225020225 - 2¹⁴ = 225003841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 225020197 and 225020206.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4500380 + ... + 4500429.

It is an arithmetic number, because the mean of its divisors is an integer number (46504185).

Almost surely, 2^225020225 is an apocalyptic number.

225020225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225020225 is a deficient number, since it is larger than the sum of its proper divisors (54004885).

225020225 is an equidigital number, since it uses as much as digits as its factorization.

225020225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9000819 (or 9000814 counting only the distinct ones).

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

The square root of 225020225 is about 15000.6741515173. The cubic root of 225020225 is about 608.2384230906.

Adding to 225020225 its reverse (522020522), we get a palindrome (747040747).

The spelling of 225020225 in words is "two hundred twenty-five million, twenty thousand, two hundred twenty-five".