115555571 has 4 divisors (see below), whose sum is σ = 117514200. Its totient is φ = 113596944.

The previous prime is 115555547. The next prime is 115555603. The reversal of 115555571 is 175555511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 175555511 = 31 ⋅5663081.

It is a cyclic number.

It is not a de Polignac number, because 115555571 - 2¹⁴ = 115539187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115555501) 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 in 3 ways as a sum of consecutive naturals, for example, 979226 + ... + 979343.

It is an arithmetic number, because the mean of its divisors is an integer number (29378550).

Almost surely, 2^115555571 is an apocalyptic number.

115555571 is a deficient number, since it is larger than the sum of its proper divisors (1958629).

115555571 is an equidigital number, since it uses as much as digits as its factorization.

115555571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958628.

The product of its digits is 21875, while the sum is 35.

The square root of 115555571 is about 10749.6777160992. The cubic root of 115555571 is about 487.0762599707.

The spelling of 115555571 in words is "one hundred fifteen million, five hundred fifty-five thousand, five hundred seventy-one".