1224308213 has 2 divisors, whose sum is σ = 1224308214. Its totient is φ = 1224308212.

The previous prime is 1224308209. The next prime is 1224308221. The reversal of 1224308213 is 3128034221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1092104209 + 132204004 = 33047^2 + 11498^2 .

It is a cyclic number.

It is not a de Polignac number, because 1224308213 - 2² = 1224308209 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1224308243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 612154106 + 612154107.

It is an arithmetic number, because the mean of its divisors is an integer number (612154107).

Almost surely, 2^1224308213 is an apocalyptic number.

It is an amenable number.

1224308213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1224308213 is an equidigital number, since it uses as much as digits as its factorization.

1224308213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 1224308213 is about 34990.1159329317. The cubic root of 1224308213 is about 1069.7860267393.

The spelling of 1224308213 in words is "one billion, two hundred twenty-four million, three hundred eight thousand, two hundred thirteen".