225400321 has 4 divisors (see below), whose sum is σ = 226134832. Its totient is φ = 224665812.

The previous prime is 225400291. The next prime is 225400327. The reversal of 225400321 is 123004522.

225400321 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225400321 - 2⁵ = 225400289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225400327) 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, 366795 + ... + 367408.

It is an arithmetic number, because the mean of its divisors is an integer number (56533708).

Almost surely, 2^225400321 is an apocalyptic number.

It is an amenable number.

225400321 is a deficient number, since it is larger than the sum of its proper divisors (734511).

225400321 is an equidigital number, since it uses as much as digits as its factorization.

225400321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734510.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 225400321 is about 15013.3381031668. The cubic root of 225400321 is about 608.5807018668.

Adding to 225400321 its reverse (123004522), we get a palindrome (348404843).

The spelling of 225400321 in words is "two hundred twenty-five million, four hundred thousand, three hundred twenty-one".