225494221 has 2 divisors, whose sum is σ = 225494222. Its totient is φ = 225494220.

The previous prime is 225494207. The next prime is 225494237. The reversal of 225494221 is 122494522.

225494221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131675625 + 93818596 = 11475^2 + 9686^2 .

It is a cyclic number.

It is not a de Polignac number, because 225494221 - 2¹⁹ = 224969933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225494281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112747110 + 112747111.

It is an arithmetic number, because the mean of its divisors is an integer number (112747111).

Almost surely, 2^225494221 is an apocalyptic number.

It is an amenable number.

225494221 is a deficient number, since it is larger than the sum of its proper divisors (1).

225494221 is an equidigital number, since it uses as much as digits as its factorization.

225494221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11520, while the sum is 31.

The square root of 225494221 is about 15016.4649967960. The cubic root of 225494221 is about 608.6652001112.

The spelling of 225494221 in words is "two hundred twenty-five million, four hundred ninety-four thousand, two hundred twenty-one".