225175709 has 4 divisors (see below), whose sum is σ = 245646240. Its totient is φ = 204705180.

The previous prime is 225175667. The next prime is 225175711. The reversal of 225175709 is 907571522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225175709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225175789) 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 3 ways as a sum of consecutive naturals, for example, 10235249 + ... + 10235270.

It is an arithmetic number, because the mean of its divisors is an integer number (61411560).

Almost surely, 2^225175709 is an apocalyptic number.

It is an amenable number.

225175709 is a deficient number, since it is larger than the sum of its proper divisors (20470531).

225175709 is a wasteful number, since it uses less digits than its factorization.

225175709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20470530.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 225175709 is about 15005.8558236443. The cubic root of 225175709 is about 608.3784839364.

The spelling of 225175709 in words is "two hundred twenty-five million, one hundred seventy-five thousand, seven hundred nine".