3131121545 has 16 divisors (see below), whose sum is σ = 3834419472. Its totient is φ = 2453667840.

The previous prime is 3131121527. The next prime is 3131121589. The reversal of 3131121545 is 5451211313.

3131121545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 289272064 + 2841849481 = 17008^2 + 53309^2 .

It is not a de Polignac number, because 3131121545 - 2¹⁶ = 3131056009 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160649 + ... + 179081.

It is an arithmetic number, because the mean of its divisors is an integer number (239651217).

Almost surely, 2^3131121545 is an apocalyptic number.

It is an amenable number.

3131121545 is a deficient number, since it is larger than the sum of its proper divisors (703297927).

3131121545 is a wasteful number, since it uses less digits than its factorization.

3131121545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19132.

The product of its digits is 1800, while the sum is 26.

The square root of 3131121545 is about 55956.4254129944. The cubic root of 3131121545 is about 1462.9628867662.

Adding to 3131121545 its reverse (5451211313), we get a palindrome (8582332858).

The spelling of 3131121545 in words is "three billion, one hundred thirty-one million, one hundred twenty-one thousand, five hundred forty-five".