115131817 has 2 divisors, whose sum is σ = 115131818. Its totient is φ = 115131816.

The previous prime is 115131763. The next prime is 115131857. The reversal of 115131817 is 718131511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105247081 + 9884736 = 10259^2 + 3144^2 .

It is a cyclic number.

It is not a de Polignac number, because 115131817 - 2⁷ = 115131689 is a prime.

It is not a weakly prime, because it can be changed into another prime (115131857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57565908 + 57565909.

It is an arithmetic number, because the mean of its divisors is an integer number (57565909).

Almost surely, 2^115131817 is an apocalyptic number.

It is an amenable number.

115131817 is a deficient number, since it is larger than the sum of its proper divisors (1).

115131817 is an equidigital number, since it uses as much as digits as its factorization.

115131817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 840, while the sum is 28.

The square root of 115131817 is about 10729.9495338981. The cubic root of 115131817 is about 486.4801446871.

The spelling of 115131817 in words is "one hundred fifteen million, one hundred thirty-one thousand, eight hundred seventeen".