3131442220 has 48 divisors (see below), whose sum is σ = 6686971200. Its totient is φ = 1231543040.

The previous prime is 3131442161. The next prime is 3131442241. The reversal of 3131442220 is 222441313.

It is a junction number, because it is equal to n+sod(n) for n = 3131442191 and 3131442200.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 549546 + ... + 555214.

It is an arithmetic number, because the mean of its divisors is an integer number (139311900).

Almost surely, 2^3131442220 is an apocalyptic number.

It is an amenable number.

3131442220 is an abundant number, since it is smaller than the sum of its proper divisors (3555528980).

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

3131442220 is a wasteful number, since it uses less digits than its factorization.

3131442220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6138 (or 6136 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 3131442220 is about 55959.2907388934. The cubic root of 3131442220 is about 1463.0128283609.

Adding to 3131442220 its reverse (222441313), we get a palindrome (3353883533).

The spelling of 3131442220 in words is "three billion, one hundred thirty-one million, four hundred forty-two thousand, two hundred twenty".