224855221 has 2 divisors, whose sum is σ = 224855222. Its totient is φ = 224855220.

The previous prime is 224855201. The next prime is 224855227. The reversal of 224855221 is 122558422.

224855221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 132503121 + 92352100 = 11511^2 + 9610^2 .

It is a cyclic number.

It is not a de Polignac number, because 224855221 - 2¹¹ = 224853173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224855227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112427610 + 112427611.

It is an arithmetic number, because the mean of its divisors is an integer number (112427611).

Almost surely, 2^224855221 is an apocalyptic number.

It is an amenable number.

224855221 is a deficient number, since it is larger than the sum of its proper divisors (1).

224855221 is an equidigital number, since it uses as much as digits as its factorization.

224855221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12800, while the sum is 31.

The square root of 224855221 is about 14995.1732567517. The cubic root of 224855221 is about 608.0897159925.

The spelling of 224855221 in words is "two hundred twenty-four million, eight hundred fifty-five thousand, two hundred twenty-one".