2131404145 has 8 divisors (see below), whose sum is σ = 2754430056. Its totient is φ = 1573959936.

The previous prime is 2131404139. The next prime is 2131404157. The reversal of 2131404145 is 5414041312.

It can be written as a sum of positive squares in 4 ways, for example, as 1766241 + 2129637904 = 1329^2 + 46148^2 .

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 2131404145 - 2¹³ = 2131395953 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 16395352 + ... + 16395481.

It is an arithmetic number, because the mean of its divisors is an integer number (344303757).

Almost surely, 2^2131404145 is an apocalyptic number.

It is an amenable number.

2131404145 is a deficient number, since it is larger than the sum of its proper divisors (623025911).

2131404145 is a wasteful number, since it uses less digits than its factorization.

2131404145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32790851.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 2131404145 is about 46167.1327353129. The cubic root of 2131404145 is about 1286.9310185166.

Adding to 2131404145 its reverse (5414041312), we get a palindrome (7545445457).

The spelling of 2131404145 in words is "two billion, one hundred thirty-one million, four hundred four thousand, one hundred forty-five".