225697609 has 4 divisors (see below), whose sum is σ = 226146816. Its totient is φ = 225248404.

The previous prime is 225697603. The next prime is 225697651. The reversal of 225697609 is 906796522.

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 not a de Polignac number, because 225697609 - 2⁹ = 225697097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225697603) 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, 223849 + ... + 224854.

It is an arithmetic number, because the mean of its divisors is an integer number (56536704).

Almost surely, 2^225697609 is an apocalyptic number.

It is an amenable number.

225697609 is a deficient number, since it is larger than the sum of its proper divisors (449207).

225697609 is an equidigital number, since it uses as much as digits as its factorization.

225697609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449206.

The product of its (nonzero) digits is 408240, while the sum is 46.

The square root of 225697609 is about 15023.2356368394. The cubic root of 225697609 is about 608.8481434495.

The spelling of 225697609 in words is "two hundred twenty-five million, six hundred ninety-seven thousand, six hundred nine".