225305121 has 16 divisors (see below), whose sum is σ = 305510400. Its totient is φ = 147661008.

The previous prime is 225305111. The next prime is 225305123. The reversal of 225305121 is 121503522.

225305121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225305121 - 2¹⁵ = 225272353 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (225305123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143740 + ... + 145298.

It is an arithmetic number, because the mean of its divisors is an integer number (19094400).

Almost surely, 2^225305121 is an apocalyptic number.

It is an amenable number.

225305121 is a deficient number, since it is larger than the sum of its proper divisors (80205279).

225305121 is a wasteful number, since it uses less digits than its factorization.

225305121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 225305121 is about 15010.1672542314. The cubic root of 225305121 is about 608.4950098246.

Adding to 225305121 its reverse (121503522), we get a palindrome (346808643).

The spelling of 225305121 in words is "two hundred twenty-five million, three hundred five thousand, one hundred twenty-one".