115565539 has 2 divisors, whose sum is σ = 115565540. Its totient is φ = 115565538.

The previous prime is 115565491. The next prime is 115565579. The reversal of 115565539 is 935565511.

It is an a-pointer prime, because the next prime (115565579) can be obtained adding 115565539 to its sum of digits (40).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115565539 - 2⁹ = 115565027 is a prime.

It is not a weakly prime, because it can be changed into another prime (115565579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57782769 + 57782770.

It is an arithmetic number, because the mean of its divisors is an integer number (57782770).

Almost surely, 2^115565539 is an apocalyptic number.

115565539 is a deficient number, since it is larger than the sum of its proper divisors (1).

115565539 is an equidigital number, since it uses as much as digits as its factorization.

115565539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 101250, while the sum is 40.

The square root of 115565539 is about 10750.1413479079. The cubic root of 115565539 is about 487.0902648820.

The spelling of 115565539 in words is "one hundred fifteen million, five hundred sixty-five thousand, five hundred thirty-nine".