225666025 has 12 divisors (see below), whose sum is σ = 301351372. Its totient is φ = 166645440.

The previous prime is 225666011. The next prime is 225666029. The reversal of 225666025 is 520666522.

It can be written as a sum of positive squares in 6 ways, for example, as 44036496 + 181629529 = 6636^2 + 13477^2 .

It is not a de Polignac number, because 225666025 - 2⁷ = 225665897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225666029) 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, 346854 + ... + 347503.

Almost surely, 2^225666025 is an apocalyptic number.

225666025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225666025 is a deficient number, since it is larger than the sum of its proper divisors (75685347).

225666025 is a wasteful number, since it uses less digits than its factorization.

225666025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 694380 (or 694375 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 225666025 is about 15022.1844283713. The cubic root of 225666025 is about 608.8197414992.

The spelling of 225666025 in words is "two hundred twenty-five million, six hundred sixty-six thousand, twenty-five".