225026221 has 4 divisors (see below), whose sum is σ = 257172832. Its totient is φ = 192879612.

The previous prime is 225026201. The next prime is 225026251. The reversal of 225026221 is 122620522.

It is a happy number.

225026221 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, and also an emirpimes, since its reverse is a distinct semiprime: 122620522 = 2 ⋅61310261.

It is a cyclic number.

It is not a de Polignac number, because 225026221 - 2⁵ = 225026189 is a prime.

It is a super-3 number, since 3×225026221³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225026192 and 225026201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225026201) 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, 16073295 + ... + 16073308.

It is an arithmetic number, because the mean of its divisors is an integer number (64293208).

Almost surely, 2^225026221 is an apocalyptic number.

It is an amenable number.

225026221 is a deficient number, since it is larger than the sum of its proper divisors (32146611).

225026221 is an equidigital number, since it uses as much as digits as its factorization.

225026221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32146610.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 225026221 is about 15000.8740078703. The cubic root of 225026221 is about 608.2438255164.

Adding to 225026221 its reverse (122620522), we get a palindrome (347646743).

The spelling of 225026221 in words is "two hundred twenty-five million, twenty-six thousand, two hundred twenty-one".