31230333220 has 96 divisors (see below), whose sum is σ = 68263243776. Its totient is φ = 11991744000.

The previous prime is 31230333209. The next prime is 31230333301. The reversal of 31230333220 is 2233303213.

It is a junction number, because it is equal to n+sod(n) for n = 31230333191 and 31230333200.

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, 28624875 + ... + 28625965.

It is an arithmetic number, because the mean of its divisors is an integer number (711075456).

Almost surely, 2^31230333220 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 31230333220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34131621888).

31230333220 is an abundant number, since it is smaller than the sum of its proper divisors (37032910556).

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

31230333220 is a wasteful number, since it uses less digits than its factorization.

31230333220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1619 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 22.

Adding to 31230333220 its reverse (2233303213), we get a palindrome (33463636433).

The spelling of 31230333220 in words is "thirty-one billion, two hundred thirty million, three hundred thirty-three thousand, two hundred twenty".