729225571 has 4 divisors (see below), whose sum is σ = 731257200. Its totient is φ = 727193944.

The previous prime is 729225551. The next prime is 729225577. The reversal of 729225571 is 175522927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175522927 = 41 ⋅4281047.

It is a cyclic number.

It is not a de Polignac number, because 729225571 - 2⁷ = 729225443 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (729225577) 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 in 3 ways as a sum of consecutive naturals, for example, 1015276 + ... + 1015993.

It is an arithmetic number, because the mean of its divisors is an integer number (182814300).

Almost surely, 2^729225571 is an apocalyptic number.

729225571 is a deficient number, since it is larger than the sum of its proper divisors (2031629).

729225571 is a wasteful number, since it uses less digits than its factorization.

729225571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2031628.

The product of its digits is 88200, while the sum is 40.

The square root of 729225571 is about 27004.1769176548. The cubic root of 729225571 is about 900.0928179993.

The spelling of 729225571 in words is "seven hundred twenty-nine million, two hundred twenty-five thousand, five hundred seventy-one".