131103231257 has 2 divisors, whose sum is σ = 131103231258. Its totient is φ = 131103231256.

The previous prime is 131103231229. The next prime is 131103231307. The reversal of 131103231257 is 752132301131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128878128016 + 2225103241 = 358996^2 + 47171^2 .

It is a cyclic number.

It is not a de Polignac number, because 131103231257 - 2¹⁴ = 131103214873 is a prime.

It is not a weakly prime, because it can be changed into another prime (131103231227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65551615628 + 65551615629.

It is an arithmetic number, because the mean of its divisors is an integer number (65551615629).

Almost surely, 2^131103231257 is an apocalyptic number.

It is an amenable number.

131103231257 is a deficient number, since it is larger than the sum of its proper divisors (1).

131103231257 is an equidigital number, since it uses as much as digits as its factorization.

131103231257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

Adding to 131103231257 its reverse (752132301131), we get a palindrome (883235532388).

The spelling of 131103231257 in words is "one hundred thirty-one billion, one hundred three million, two hundred thirty-one thousand, two hundred fifty-seven".