2131404157 has 2 divisors, whose sum is σ = 2131404158. Its totient is φ = 2131404156.

The previous prime is 2131404139. The next prime is 2131404161. The reversal of 2131404157 is 7514041312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1538286841 + 593117316 = 39221^2 + 24354^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131404157 - 2²³ = 2123015549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2131404127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065702078 + 1065702079.

It is an arithmetic number, because the mean of its divisors is an integer number (1065702079).

Almost surely, 2^2131404157 is an apocalyptic number.

It is an amenable number.

2131404157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131404157 is an equidigital number, since it uses as much as digits as its factorization.

2131404157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 2131404157 is about 46167.1328652755. The cubic root of 2131404157 is about 1286.9310209318.

Adding to 2131404157 its reverse (7514041312), we get a palindrome (9645445469).

The spelling of 2131404157 in words is "two billion, one hundred thirty-one million, four hundred four thousand, one hundred fifty-seven".