115611 has 8 divisors (see below), whose sum is σ = 156240. Its totient is φ = 76032.

The previous prime is 115603. The next prime is 115613. The reversal of 115611 is 116511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115611 - 2³ = 115603 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115613) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51 + ... + 483.

It is an arithmetic number, because the mean of its divisors is an integer number (19530).

2¹¹⁵⁶¹¹ is an apocalyptic number.

115611 is a deficient number, since it is larger than the sum of its proper divisors (40629).

115611 is an equidigital number, since it uses as much as digits as its factorization.

115611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 525.

The product of its digits is 30, while the sum is 15.

The square root of 115611 is about 340.0161760858. The cubic root of 115611 is about 48.7154126790.

Subtracting 115611 from its reverse (116511), we obtain a square (900 = 30²).

The spelling of 115611 in words is "one hundred fifteen thousand, six hundred eleven".