3131100220 has 48 divisors (see below), whose sum is σ = 6696345600. Its totient is φ = 1229567040.

The previous prime is 3131100209. The next prime is 3131100251. The reversal of 3131100220 is 220011313.

It is a self number, because there is not a number n which added to its sum of digits gives 3131100220.

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, 277285 + ... + 288355.

It is an arithmetic number, because the mean of its divisors is an integer number (139507200).

Almost surely, 2^3131100220 is an apocalyptic number.

It is an amenable number.

3131100220 is an abundant number, since it is smaller than the sum of its proper divisors (3565245380).

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

3131100220 is a wasteful number, since it uses less digits than its factorization.

3131100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11338 (or 11336 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 3131100220 is about 55956.2348626138. The cubic root of 3131100220 is about 1462.9595655117.

Adding to 3131100220 its reverse (220011313), we get a palindrome (3351111533).

The spelling of 3131100220 in words is "three billion, one hundred thirty-one million, one hundred thousand, two hundred twenty".