3131143305 has 16 divisors (see below), whose sum is σ = 5014878144. Its totient is φ = 1668260160.

The previous prime is 3131143291. The next prime is 3131143307. The reversal of 3131143305 is 5033411313.

It is not a de Polignac number, because 3131143305 - 2⁷ = 3131143177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3131143307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 89731 + ... + 119640.

It is an arithmetic number, because the mean of its divisors is an integer number (313429884).

Almost surely, 2^3131143305 is an apocalyptic number.

It is an amenable number.

3131143305 is a deficient number, since it is larger than the sum of its proper divisors (1883734839).

3131143305 is a wasteful number, since it uses less digits than its factorization.

3131143305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210376.

The product of its (nonzero) digits is 1620, while the sum is 24.

The square root of 3131143305 is about 55956.6198496657. The cubic root of 3131143305 is about 1462.9662757541.

Adding to 3131143305 its reverse (5033411313), we get a palindrome (8164554618).

The spelling of 3131143305 in words is "three billion, one hundred thirty-one million, one hundred forty-three thousand, three hundred five".