115801111 has 2 divisors, whose sum is σ = 115801112. Its totient is φ = 115801110.

The previous prime is 115801079. The next prime is 115801121. The reversal of 115801111 is 111108511.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115801111 - 2⁵ = 115801079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115801121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57900555 + 57900556.

It is an arithmetic number, because the mean of its divisors is an integer number (57900556).

Almost surely, 2^115801111 is an apocalyptic number.

115801111 is a deficient number, since it is larger than the sum of its proper divisors (1).

115801111 is an equidigital number, since it uses as much as digits as its factorization.

115801111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40, while the sum is 19.

The square root of 115801111 is about 10761.0924631285. The cubic root of 115801111 is about 487.4210063548.

Adding to 115801111 its reverse (111108511), we get a palindrome (226909622).

The spelling of 115801111 in words is "one hundred fifteen million, eight hundred one thousand, one hundred eleven".