131566381057 has 2 divisors, whose sum is σ = 131566381058. Its totient is φ = 131566381056.

The previous prime is 131566381031. The next prime is 131566381073. The reversal of 131566381057 is 750183665131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92012728896 + 39553652161 = 303336^2 + 198881^2 .

It is a cyclic number.

It is not a de Polignac number, because 131566381057 - 2⁷ = 131566380929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131566380998 and 131566381016.

It is not a weakly prime, because it can be changed into another prime (131566381027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65783190528 + 65783190529.

It is an arithmetic number, because the mean of its divisors is an integer number (65783190529).

Almost surely, 2^131566381057 is an apocalyptic number.

It is an amenable number.

131566381057 is a deficient number, since it is larger than the sum of its proper divisors (1).

131566381057 is an equidigital number, since it uses as much as digits as its factorization.

131566381057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 453600, while the sum is 46.

The spelling of 131566381057 in words is "one hundred thirty-one billion, five hundred sixty-six million, three hundred eighty-one thousand, fifty-seven".