224305813 has 2 divisors, whose sum is σ = 224305814. Its totient is φ = 224305812.

The previous prime is 224305799. The next prime is 224305817. The reversal of 224305813 is 318503422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221622769 + 2683044 = 14887^2 + 1638^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-224305813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (224305817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112152906 + 112152907.

It is an arithmetic number, because the mean of its divisors is an integer number (112152907).

Almost surely, 2^224305813 is an apocalyptic number.

It is an amenable number.

224305813 is a deficient number, since it is larger than the sum of its proper divisors (1).

224305813 is an equidigital number, since it uses as much as digits as its factorization.

224305813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 224305813 is about 14976.8425577623. The cubic root of 224305813 is about 607.5940461919.

The spelling of 224305813 in words is "two hundred twenty-four million, three hundred five thousand, eight hundred thirteen".