225456809 has 16 divisors (see below), whose sum is σ = 233986368. Its totient is φ = 217147392.

The previous prime is 225456779. The next prime is 225456853. The reversal of 225456809 is 908654522.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225456809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225456709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 734234 + ... + 734540.

It is an arithmetic number, because the mean of its divisors is an integer number (14624148).

Almost surely, 2^225456809 is an apocalyptic number.

It is an amenable number.

225456809 is a deficient number, since it is larger than the sum of its proper divisors (8529559).

225456809 is a wasteful number, since it uses less digits than its factorization.

225456809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584.

The product of its (nonzero) digits is 172800, while the sum is 41.

The square root of 225456809 is about 15015.2192458186. The cubic root of 225456809 is about 608.6315368066.

The spelling of 225456809 in words is "two hundred twenty-five million, four hundred fifty-six thousand, eight hundred nine".