224321729 has 2 divisors, whose sum is σ = 224321730. Its totient is φ = 224321728.

The previous prime is 224321723. The next prime is 224321761. The reversal of 224321729 is 927123422.

224321729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (224321761) can be obtained adding 224321729 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163840000 + 60481729 = 12800^2 + 7777^2 .

It is a cyclic number.

It is not a de Polignac number, because 224321729 - 2¹² = 224317633 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 224321695 and 224321704.

It is not a weakly prime, because it can be changed into another prime (224321723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112160864 + 112160865.

It is an arithmetic number, because the mean of its divisors is an integer number (112160865).

Almost surely, 2^224321729 is an apocalyptic number.

It is an amenable number.

224321729 is a deficient number, since it is larger than the sum of its proper divisors (1).

224321729 is an equidigital number, since it uses as much as digits as its factorization.

224321729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 224321729 is about 14977.3739019896. The cubic root of 224321729 is about 607.6084168079.

The spelling of 224321729 in words is "two hundred twenty-four million, three hundred twenty-one thousand, seven hundred twenty-nine".