3131103220 has 48 divisors (see below), whose sum is σ = 7517881728. Its totient is φ = 1073059200.

The previous prime is 3131103203. The next prime is 3131103247. The reversal of 3131103220 is 223011313.

It is a junction number, because it is equal to n+sod(n) for n = 3131103194 and 3131103203.

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, 546370 + ... + 552070.

It is an arithmetic number, because the mean of its divisors is an integer number (156622536).

Almost surely, 2^3131103220 is an apocalyptic number.

It is an amenable number.

3131103220 is an abundant number, since it is smaller than the sum of its proper divisors (4386778508).

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

3131103220 is a wasteful number, since it uses less digits than its factorization.

3131103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9640 (or 9638 counting only the distinct ones).

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

The square root of 3131103220 is about 55956.2616692717. The cubic root of 3131103220 is about 1462.9600327466.

Adding to 3131103220 its reverse (223011313), we get a palindrome (3354114533).

The spelling of 3131103220 in words is "three billion, one hundred thirty-one million, one hundred three thousand, two hundred twenty".