225489725 has 6 divisors (see below), whose sum is σ = 279607290. Its totient is φ = 180391760.

The previous prime is 225489679. The next prime is 225489727. The reversal of 225489725 is 527984522.

It can be written as a sum of positive squares in 3 ways, for example, as 29181604 + 196308121 = 5402^2 + 14011^2 .

It is not a de Polignac number, because 225489725 - 2¹⁴ = 225473341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225489727) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4509770 + ... + 4509819.

It is an arithmetic number, because the mean of its divisors is an integer number (46601215).

Almost surely, 2^225489725 is an apocalyptic number.

225489725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225489725 is a deficient number, since it is larger than the sum of its proper divisors (54117565).

225489725 is an equidigital number, since it uses as much as digits as its factorization.

225489725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9019599 (or 9019594 counting only the distinct ones).

The product of its digits is 403200, while the sum is 44.

The square root of 225489725 is about 15016.3152937064. The cubic root of 225489725 is about 608.6611548088.

The spelling of 225489725 in words is "two hundred twenty-five million, four hundred eighty-nine thousand, seven hundred twenty-five".