115506133 has 4 divisors (see below), whose sum is σ = 117685548. Its totient is φ = 113326720.

The previous prime is 115506121. The next prime is 115506151. The reversal of 115506133 is 331605511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 331605511 = 229 ⋅1448059.

It can be written as a sum of positive squares in 2 ways, for example, as 36687249 + 78818884 = 6057^2 + 8878^2 .

It is a de Polignac number, because none of the positive numbers 2^k-115506133 is a prime.

It is a super-2 number, since 2×115506133² = 26683333521227378, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 115506098 and 115506107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115506233) 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, 1089628 + ... + 1089733.

It is an arithmetic number, because the mean of its divisors is an integer number (29421387).

Almost surely, 2^115506133 is an apocalyptic number.

It is an amenable number.

115506133 is a deficient number, since it is larger than the sum of its proper divisors (2179415).

115506133 is an equidigital number, since it uses as much as digits as its factorization.

115506133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2179414.

The product of its (nonzero) digits is 1350, while the sum is 25.

The square root of 115506133 is about 10747.3779592978. The cubic root of 115506133 is about 487.0067883136.

The spelling of 115506133 in words is "one hundred fifteen million, five hundred six thousand, one hundred thirty-three".