225330121 has 9 divisors (see below), whose sum is σ = 239635911. Its totient is φ = 211835232.

The previous prime is 225330109. The next prime is 225330151. The reversal of 225330121 is 121033522.

The square root of 225330121 is 15011.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 175430025 + 49900096 = 13245^2 + 7064^2 .

It is not a de Polignac number, because 225330121 - 2¹¹ = 225328073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225330151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 254746 + ... + 255628.

Almost surely, 2^225330121 is an apocalyptic number.

225330121 is the 15011-st square number.

225330121 is the 7506-th centered octagonal number.

It is an amenable number.

225330121 is a deficient number, since it is larger than the sum of its proper divisors (14305790).

225330121 is an frugal number, since it uses more digits than its factorization.

225330121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800 (or 900 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 19.

The cubic root of 225330121 is about 608.5175153237.

Adding to 225330121 its reverse (121033522), we get a palindrome (346363643).

The spelling of 225330121 in words is "two hundred twenty-five million, three hundred thirty thousand, one hundred twenty-one".