30331213220 has 96 divisors (see below), whose sum is σ = 79473623040. Its totient is φ = 9446624640.

The previous prime is 30331213189. The next prime is 30331213259. The reversal of 30331213220 is 2231213303.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 30331213192 and 30331213201.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2209217 + ... + 2222903.

It is an arithmetic number, because the mean of its divisors is an integer number (827850240).

Almost surely, 2^30331213220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30331213220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39736811520).

30331213220 is an abundant number, since it is smaller than the sum of its proper divisors (49142409820).

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

30331213220 is a wasteful number, since it uses less digits than its factorization.

30331213220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15153 (or 15151 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30331213220 its reverse (2231213303), we get a palindrome (32562426523).

The spelling of 30331213220 in words is "thirty billion, three hundred thirty-one million, two hundred thirteen thousand, two hundred twenty".