305225220 has 24 divisors (see below), whose sum is σ = 854630784. Its totient is φ = 81393376.

The previous prime is 305225201. The next prime is 305225257. The reversal of 305225220 is 22522503.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2543484 + ... + 2543603.

It is an arithmetic number, because the mean of its divisors is an integer number (35609616).

Almost surely, 2^305225220 is an apocalyptic number.

305225220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

305225220 is an abundant number, since it is smaller than the sum of its proper divisors (549405564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

305225220 is a wasteful number, since it uses less digits than its factorization.

305225220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5087099 (or 5087097 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 305225220 is about 17470.6960365064. The cubic root of 305225220 is about 673.2971949584.

Adding to 305225220 its reverse (22522503), we get a palindrome (327747723).

The spelling of 305225220 in words is "three hundred five million, two hundred twenty-five thousand, two hundred twenty".