3131330220 has 36 divisors (see below), whose sum is σ = 9498368880. Its totient is φ = 835021344.

The previous prime is 3131330201. The next prime is 3131330261. The reversal of 3131330220 is 220331313.

3131330220 is a `hidden beast` number, since 31 + 313 + 302 + 20 = 666.

3131330220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3131330193 and 3131330202.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8697960 + ... + 8698319.

It is an arithmetic number, because the mean of its divisors is an integer number (263843580).

Almost surely, 2^3131330220 is an apocalyptic number.

3131330220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3131330220 is an abundant number, since it is smaller than the sum of its proper divisors (6367038660).

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

3131330220 is a wasteful number, since it uses less digits than its factorization.

3131330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17396294 (or 17396289 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 3131330220 is about 55958.2900024652. The cubic root of 3131330220 is about 1462.9953859835.

Adding to 3131330220 its reverse (220331313), we get a palindrome (3351661533).

The spelling of 3131330220 in words is "three billion, one hundred thirty-one million, three hundred thirty thousand, two hundred twenty".