131251326257 has 2 divisors, whose sum is σ = 131251326258. Its totient is φ = 131251326256.

The previous prime is 131251326211. The next prime is 131251326289. The reversal of 131251326257 is 752623152131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 110133714496 + 21117611761 = 331864^2 + 145319^2 .

It is a cyclic number.

It is not a de Polignac number, because 131251326257 - 2¹² = 131251322161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131251326257.

It is not a weakly prime, because it can be changed into another prime (131251326457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65625663128 + 65625663129.

It is an arithmetic number, because the mean of its divisors is an integer number (65625663129).

Almost surely, 2^131251326257 is an apocalyptic number.

It is an amenable number.

131251326257 is a deficient number, since it is larger than the sum of its proper divisors (1).

131251326257 is an equidigital number, since it uses as much as digits as its factorization.

131251326257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 75600, while the sum is 38.

Adding to 131251326257 its reverse (752623152131), we get a palindrome (883874478388).

The spelling of 131251326257 in words is "one hundred thirty-one billion, two hundred fifty-one million, three hundred twenty-six thousand, two hundred fifty-seven".