115557311 has 4 divisors (see below), whose sum is σ = 118375824. Its totient is φ = 112738800.

The previous prime is 115557287. The next prime is 115557319. The reversal of 115557311 is 113755511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113755511 = 43 ⋅2645477.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115557311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115557319) 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, 1409195 + ... + 1409276.

It is an arithmetic number, because the mean of its divisors is an integer number (29593956).

Almost surely, 2^115557311 is an apocalyptic number.

115557311 is a deficient number, since it is larger than the sum of its proper divisors (2818513).

115557311 is an equidigital number, since it uses as much as digits as its factorization.

115557311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818512.

The product of its digits is 2625, while the sum is 29.

The square root of 115557311 is about 10749.7586484535. The cubic root of 115557311 is about 487.0787047063.

The spelling of 115557311 in words is "one hundred fifteen million, five hundred fifty-seven thousand, three hundred eleven".