225258709 has 4 divisors (see below), whose sum is σ = 242586316. Its totient is φ = 207931104.

The previous prime is 225258707. The next prime is 225258713. The reversal of 225258709 is 907852522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 907852522 = 2 ⋅453926261.

It can be written as a sum of positive squares in 2 ways, for example, as 80730225 + 144528484 = 8985^2 + 12022^2 .

It is a cyclic number.

It is not a de Polignac number, because 225258709 - 2¹ = 225258707 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 (225258707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8663784 + ... + 8663809.

It is an arithmetic number, because the mean of its divisors is an integer number (60646579).

Almost surely, 2^225258709 is an apocalyptic number.

It is an amenable number.

225258709 is a deficient number, since it is larger than the sum of its proper divisors (17327607).

225258709 is a wasteful number, since it uses less digits than its factorization.

225258709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17327606.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 225258709 is about 15008.6211558557. The cubic root of 225258709 is about 608.4532244009.

The spelling of 225258709 in words is "two hundred twenty-five million, two hundred fifty-eight thousand, seven hundred nine".