224128649 has 2 divisors, whose sum is σ = 224128650. Its totient is φ = 224128648.

The previous prime is 224128643. The next prime is 224128651. The reversal of 224128649 is 946821422.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159567424 + 64561225 = 12632^2 + 8035^2 .

It is a cyclic number.

It is not a de Polignac number, because 224128649 - 2⁴ = 224128633 is a prime.

Together with 224128651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (224128643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112064324 + 112064325.

It is an arithmetic number, because the mean of its divisors is an integer number (112064325).

Almost surely, 2^224128649 is an apocalyptic number.

It is an amenable number.

224128649 is a deficient number, since it is larger than the sum of its proper divisors (1).

224128649 is an equidigital number, since it uses as much as digits as its factorization.

224128649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 224128649 is about 14970.9267916185. The cubic root of 224128649 is about 607.4340382355.

The spelling of 224128649 in words is "two hundred twenty-four million, one hundred twenty-eight thousand, six hundred forty-nine".