3131220313 has 8 divisors (see below), whose sum is σ = 3372520256. Its totient is φ = 2889982800.

The previous prime is 3131220271. The next prime is 3131220331. The reversal of 3131220313 is 3130221313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3131220313 - 2²⁵ = 3097665881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131220353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173548 + ... + 190738.

It is an arithmetic number, because the mean of its divisors is an integer number (421565032).

Almost surely, 2^3131220313 is an apocalyptic number.

It is an amenable number.

3131220313 is a deficient number, since it is larger than the sum of its proper divisors (241299943).

3131220313 is a wasteful number, since it uses less digits than its factorization.

3131220313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31215.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 3131220313 is about 55957.3079499005. The cubic root of 3131220313 is about 1462.9782691563.

Adding to 3131220313 its reverse (3130221313), we get a palindrome (6261441626).

The spelling of 3131220313 in words is "three billion, one hundred thirty-one million, two hundred twenty thousand, three hundred thirteen".