115565257 has 2 divisors, whose sum is σ = 115565258. Its totient is φ = 115565256.

The previous prime is 115565189. The next prime is 115565267. The reversal of 115565257 is 752565511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92563641 + 23001616 = 9621^2 + 4796^2 .

It is a cyclic number.

It is not a de Polignac number, because 115565257 - 2¹¹ = 115563209 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (115565267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57782628 + 57782629.

It is an arithmetic number, because the mean of its divisors is an integer number (57782629).

Almost surely, 2^115565257 is an apocalyptic number.

It is an amenable number.

115565257 is a deficient number, since it is larger than the sum of its proper divisors (1).

115565257 is an equidigital number, since it uses as much as digits as its factorization.

115565257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52500, while the sum is 37.

The square root of 115565257 is about 10750.1282317933. The cubic root of 115565257 is about 487.0898686867.

The spelling of 115565257 in words is "one hundred fifteen million, five hundred sixty-five thousand, two hundred fifty-seven".