730271221 has 4 divisors (see below), whose sum is σ = 732340332. Its totient is φ = 728202112.

The previous prime is 730271219. The next prime is 730271237. The reversal of 730271221 is 122172037.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122172037 = 13 ⋅9397849.

It can be written as a sum of positive squares in 2 ways, for example, as 445674321 + 284596900 = 21111^2 + 16870^2 .

It is a cyclic number.

It is not a de Polignac number, because 730271221 - 2¹ = 730271219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (730271291) 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, 1034026 + ... + 1034731.

It is an arithmetic number, because the mean of its divisors is an integer number (183085083).

Almost surely, 2^730271221 is an apocalyptic number.

It is an amenable number.

730271221 is a deficient number, since it is larger than the sum of its proper divisors (2069111).

730271221 is a wasteful number, since it uses less digits than its factorization.

730271221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069110.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 730271221 is about 27023.5308758867. The cubic root of 730271221 is about 900.5228324288.

The spelling of 730271221 in words is "seven hundred thirty million, two hundred seventy-one thousand, two hundred twenty-one".