305220501 has 8 divisors (see below), whose sum is σ = 452178560. Its totient is φ = 203480316.

The previous prime is 305220479. The next prime is 305220521. The reversal of 305220501 is 105022503.

It is a happy number.

It is not a de Polignac number, because 305220501 - 2⁵ = 305220469 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (305220521) 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, 5652205 + ... + 5652258.

It is an arithmetic number, because the mean of its divisors is an integer number (56522320).

Almost surely, 2^305220501 is an apocalyptic number.

It is an amenable number.

305220501 is a deficient number, since it is larger than the sum of its proper divisors (146958059).

305220501 is a wasteful number, since it uses less digits than its factorization.

305220501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11304472 (or 11304466 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 305220501 is about 17470.5609812622. The cubic root of 305220501 is about 673.2937250552.

The spelling of 305220501 in words is "three hundred five million, two hundred twenty thousand, five hundred one".