3111303220 has 48 divisors (see below), whose sum is σ = 6758438400. Its totient is φ = 1201887360.

The previous prime is 3111303211. The next prime is 3111303253. The reversal of 3111303220 is 223031113.

3111303220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3111303194 and 3111303203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310651 + ... + 320509.

It is an arithmetic number, because the mean of its divisors is an integer number (140800800).

Almost surely, 2^3111303220 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 3111303220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3379219200).

3111303220 is an abundant number, since it is smaller than the sum of its proper divisors (3647135180).

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

3111303220 is a wasteful number, since it uses less digits than its factorization.

3111303220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408 (or 10406 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 3111303220 is about 55779.0571809886. The cubic root of 3111303220 is about 1459.8697606974.

Adding to 3111303220 its reverse (223031113), we get a palindrome (3334334333).

The spelling of 3111303220 in words is "three billion, one hundred eleven million, three hundred three thousand, two hundred twenty".