225642125 has 8 divisors (see below), whose sum is σ = 281601528. Its totient is φ = 180513600.

The previous prime is 225642083. The next prime is 225642133. The reversal of 225642125 is 521246522.

225642125 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 25532809 + 200109316 = 5053^2 + 14146^2 .

It is not a de Polignac number, because 225642125 - 2⁶ = 225642061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902444 + ... + 902693.

It is an arithmetic number, because the mean of its divisors is an integer number (35200191).

Almost surely, 2^225642125 is an apocalyptic number.

225642125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225642125 is a deficient number, since it is larger than the sum of its proper divisors (55959403).

225642125 is an equidigital number, since it uses as much as digits as its factorization.

225642125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805152 (or 1805142 counting only the distinct ones).

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

The square root of 225642125 is about 15021.3889171408. The cubic root of 225642125 is about 608.7982476338.

Adding to 225642125 its reverse (521246522), we get a palindrome (746888647).

The spelling of 225642125 in words is "two hundred twenty-five million, six hundred forty-two thousand, one hundred twenty-five".