115519 has 4 divisors (see below), whose sum is σ = 116200. Its totient is φ = 114840.

The previous prime is 115513. The next prime is 115523. The reversal of 115519 is 915511.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 915511 = 449 ⋅2039.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115519 is a prime.

It is a super-2 number, since 2×115519² = 26689278722, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 115519.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157 + ... + 505.

It is an arithmetic number, because the mean of its divisors is an integer number (29050).

2¹¹⁵⁵¹⁹ is an apocalyptic number.

115519 is a deficient number, since it is larger than the sum of its proper divisors (681).

115519 is an equidigital number, since it uses as much as digits as its factorization.

115519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680.

The product of its digits is 225, while the sum is 22.

The square root of 115519 is about 339.8808614794. The cubic root of 115519 is about 48.7024871289.

It can be divided in two parts, 1155 and 19, that multiplied together give a triangular number (21945 = T₂₀₉).

The spelling of 115519 in words is "one hundred fifteen thousand, five hundred nineteen".