225717725 has 12 divisors (see below), whose sum is σ = 285172596. Its totient is φ = 177166080.

The previous prime is 225717719. The next prime is 225717749. The reversal of 225717725 is 527717522.

It can be written as a sum of positive squares in 6 ways, for example, as 657721 + 225060004 = 811^2 + 15002^2 .

It is not a de Polignac number, because 225717725 - 2¹² = 225713629 is a prime.

It is a Duffinian number.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 83852 + ... + 86501.

It is an arithmetic number, because the mean of its divisors is an integer number (23764383).

Almost surely, 2^225717725 is an apocalyptic number.

225717725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225717725 is a deficient number, since it is larger than the sum of its proper divisors (59454871).

225717725 is a wasteful number, since it uses less digits than its factorization.

225717725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170416 (or 170411 counting only the distinct ones).

The product of its digits is 68600, while the sum is 38.

The square root of 225717725 is about 15023.9051181775. The cubic root of 225717725 is about 608.8662314058.

The spelling of 225717725 in words is "two hundred twenty-five million, seven hundred seventeen thousand, seven hundred twenty-five".