115778311 has 4 divisors (see below), whose sum is σ = 126303624. Its totient is φ = 105253000.

The previous prime is 115778293. The next prime is 115778321. The reversal of 115778311 is 113877511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113877511 = 11 ⋅10352501.

It is a cyclic number.

It is not a de Polignac number, because 115778311 - 2¹⁵ = 115745543 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 (115778321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5262640 + ... + 5262661.

It is an arithmetic number, because the mean of its divisors is an integer number (31575906).

Almost surely, 2^115778311 is an apocalyptic number.

115778311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

115778311 is a deficient number, since it is larger than the sum of its proper divisors (10525313).

115778311 is a wasteful number, since it uses less digits than its factorization.

115778311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10525312.

The product of its digits is 5880, while the sum is 34.

The square root of 115778311 is about 10760.0330389827. The cubic root of 115778311 is about 487.3890149277.

The spelling of 115778311 in words is "one hundred fifteen million, seven hundred seventy-eight thousand, three hundred eleven".