30331131220 has 24 divisors (see below), whose sum is σ = 68595020424. Its totient is φ = 11199186816.

The previous prime is 30331131209. The next prime is 30331131221. The reversal of 30331131220 is 2213113303.

It can be written as a sum of positive squares in 4 ways, for example, as 5705989444 + 24625141776 = 75538^2 + 156924^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30331131221) 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 7 ways as a sum of consecutive naturals, for example, 58328839 + ... + 58329358.

It is an arithmetic number, because the mean of its divisors is an integer number (2858125851).

Almost surely, 2^30331131220 is an apocalyptic number.

It is an amenable number.

30331131220 is an abundant number, since it is smaller than the sum of its proper divisors (38263889204).

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

30331131220 is a wasteful number, since it uses less digits than its factorization.

30331131220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116658219 (or 116658217 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 30331131220 its reverse (2213113303), we get a palindrome (32544244523).

The spelling of 30331131220 in words is "thirty billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty".