226517729 has 2 divisors, whose sum is σ = 226517730. Its totient is φ = 226517728.

The previous prime is 226517719. The next prime is 226517749. The reversal of 226517729 is 927715622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148230625 + 78287104 = 12175^2 + 8848^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-226517729 is a prime.

It is not a weakly prime, because it can be changed into another prime (226517719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113258864 + 113258865.

It is an arithmetic number, because the mean of its divisors is an integer number (113258865).

Almost surely, 2^226517729 is an apocalyptic number.

It is an amenable number.

226517729 is a deficient number, since it is larger than the sum of its proper divisors (1).

226517729 is an equidigital number, since it uses as much as digits as its factorization.

226517729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 41.

The square root of 226517729 is about 15050.5059383397. The cubic root of 226517729 is about 609.5847115126.

The spelling of 226517729 in words is "two hundred twenty-six million, five hundred seventeen thousand, seven hundred twenty-nine".