305131302220 has 24 divisors (see below), whose sum is σ = 641030015808. Its totient is φ = 122004086400.

The previous prime is 305131302169. The next prime is 305131302241. The reversal of 305131302220 is 22203131503.

It is a super-2 number, since 2×305131302220² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 305131302191 and 305131302200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2975476 + ... + 3076315.

It is an arithmetic number, because the mean of its divisors is an integer number (26709583992).

Almost surely, 2^305131302220 is an apocalyptic number.

It is an amenable number.

305131302220 is an abundant number, since it is smaller than the sum of its proper divisors (335898713588).

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

305131302220 is a wasteful number, since it uses less digits than its factorization.

305131302220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054321 (or 6054319 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 305131302220 its reverse (22203131503), we get a palindrome (327334433723).

The spelling of 305131302220 in words is "three hundred five billion, one hundred thirty-one million, three hundred two thousand, two hundred twenty".