225604121 has 4 divisors (see below), whose sum is σ = 225659700. Its totient is φ = 225548544.

The previous prime is 225604103. The next prime is 225604129. The reversal of 225604121 is 121406522.

It is a happy number.

225604121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16483600 + 209120521 = 4060^2 + 14461^2 .

It is a cyclic number.

It is not a de Polignac number, because 225604121 - 2¹⁴ = 225587737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225604129) 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, 21176 + ... + 29993.

It is an arithmetic number, because the mean of its divisors is an integer number (56414925).

Almost surely, 2^225604121 is an apocalyptic number.

It is an amenable number.

225604121 is a deficient number, since it is larger than the sum of its proper divisors (55579).

225604121 is an equidigital number, since it uses as much as digits as its factorization.

225604121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55578.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 225604121 is about 15020.1238676650. The cubic root of 225604121 is about 608.7640665640.

The spelling of 225604121 in words is "two hundred twenty-five million, six hundred four thousand, one hundred twenty-one".