225433309 has 6 divisors (see below), whose sum is σ = 237923070. Its totient is φ = 213568056.

The previous prime is 225433303. The next prime is 225433339. The reversal of 225433309 is 903334522.

It can be written as a sum of positive squares in only one way, i.e., 158684409 + 66748900 = 12597^2 + 8170^2 .

It is not a de Polignac number, because 225433309 - 2³ = 225433301 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 (225433301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 311874 + ... + 312595.

It is an arithmetic number, because the mean of its divisors is an integer number (39653845).

Almost surely, 2^225433309 is an apocalyptic number.

It is an amenable number.

225433309 is a deficient number, since it is larger than the sum of its proper divisors (12489761).

225433309 is an equidigital number, since it uses as much as digits as its factorization.

225433309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624507 (or 624488 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 31.

The square root of 225433309 is about 15014.4366860698. The cubic root of 225433309 is about 608.6103896105.

It can be divided in two parts, 22543 and 3309, that added together give a palindrome (25852).

The spelling of 225433309 in words is "two hundred twenty-five million, four hundred thirty-three thousand, three hundred nine".