305221073 has 8 divisors (see below), whose sum is σ = 324599520. Its totient is φ = 286174080.

The previous prime is 305221039. The next prime is 305221079. The reversal of 305221073 is 370122503.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 305221073 - 2¹⁰ = 305220049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (305221079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80963 + ... + 84648.

It is an arithmetic number, because the mean of its divisors is an integer number (40574940).

Almost surely, 2^305221073 is an apocalyptic number.

It is an amenable number.

305221073 is a deficient number, since it is larger than the sum of its proper divisors (19378447).

305221073 is a wasteful number, since it uses less digits than its factorization.

305221073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165727.

The product of its (nonzero) digits is 1260, while the sum is 23.

The square root of 305221073 is about 17470.5773516504. The cubic root of 305221073 is about 673.2941456515.

Adding to 305221073 its reverse (370122503), we get a palindrome (675343576).

The spelling of 305221073 in words is "three hundred five million, two hundred twenty-one thousand, seventy-three".