131403323402257 has 2 divisors, whose sum is σ = 131403323402258. Its totient is φ = 131403323402256.

The previous prime is 131403323402189. The next prime is 131403323402287. The reversal of 131403323402257 is 752204323304131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126283856036881 + 5119467365376 = 11237609^2 + 2262624^2 .

It is an emirp because it is prime and its reverse (752204323304131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 131403323402257 - 2¹⁹ = 131403322877969 is a prime.

It is not a weakly prime, because it can be changed into another prime (131403323402287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65701661701128 + 65701661701129.

It is an arithmetic number, because the mean of its divisors is an integer number (65701661701129).

Almost surely, 2^{131403323402257} is an apocalyptic number.

It is an amenable number.

131403323402257 is a deficient number, since it is larger than the sum of its proper divisors (1).

131403323402257 is an equidigital number, since it uses as much as digits as its factorization.

131403323402257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 40.

Adding to 131403323402257 its reverse (752204323304131), we get a palindrome (883607646706388).

The spelling of 131403323402257 in words is "one hundred thirty-one trillion, four hundred three billion, three hundred twenty-three million, four hundred two thousand, two hundred fifty-seven".