3131220424 has 16 divisors (see below), whose sum is σ = 5900544000. Its totient is φ = 1557742032.

The previous prime is 3131220419. The next prime is 3131220427. The reversal of 3131220424 is 4240221313.

It is a junction number, because it is equal to n+sod(n) for n = 3131220395 and 3131220404.

It is not an unprimeable number, because it can be changed into a prime (3131220427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981832 + ... + 985015.

It is an arithmetic number, because the mean of its divisors is an integer number (368784000).

Almost surely, 2^3131220424 is an apocalyptic number.

It is an amenable number.

3131220424 is a deficient number, since it is larger than the sum of its proper divisors (2769323576).

3131220424 is a wasteful number, since it uses less digits than its factorization.

3131220424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967052 (or 1967048 counting only the distinct ones).

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

The square root of 3131220424 is about 55957.3089417281. The cubic root of 3131220424 is about 1462.9782864436.

Adding to 3131220424 its reverse (4240221313), we get a palindrome (7371441737).

The spelling of 3131220424 in words is "three billion, one hundred thirty-one million, two hundred twenty thousand, four hundred twenty-four".