3103131321 has 6 divisors (see below), whose sum is σ = 4482300810. Its totient is φ = 2068754208.

The previous prime is 3103131313. The next prime is 3103131349. The reversal of 3103131321 is 1231313013.

It is a happy number.

3103131321 is a `hidden beast` number, since 31 + 0 + 313 + 1 + 321 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2851560000 + 251571321 = 53400^2 + 15861^2 .

It is not a de Polignac number, because 3103131321 - 2³ = 3103131313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3103131294 and 3103131303.

It is not an unprimeable number, because it can be changed into a prime (3103131391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 172396176 + ... + 172396193.

It is an arithmetic number, because the mean of its divisors is an integer number (747050135).

Almost surely, 2^3103131321 is an apocalyptic number.

It is an amenable number.

3103131321 is a deficient number, since it is larger than the sum of its proper divisors (1379169489).

3103131321 is a wasteful number, since it uses less digits than its factorization.

3103131321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344792375 (or 344792372 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3103131321 is about 55705.7566235304. The cubic root of 3103131321 is about 1458.5905145237.

Adding to 3103131321 its reverse (1231313013), we get a palindrome (4334444334).

The spelling of 3103131321 in words is "three billion, one hundred three million, one hundred thirty-one thousand, three hundred twenty-one".