116581517 has 4 divisors (see below), whose sum is σ = 125549340. Its totient is φ = 107613696.

The previous prime is 116581489. The next prime is 116581519. The reversal of 116581517 is 715185611.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 715185611 = 7 ⋅102169373.

It can be written as a sum of positive squares in 2 ways, for example, as 42432196 + 74149321 = 6514^2 + 8611^2 .

It is a cyclic number.

It is not a de Polignac number, because 116581517 - 2⁶ = 116581453 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 (116581519) 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, 4483892 + ... + 4483917.

It is an arithmetic number, because the mean of its divisors is an integer number (31387335).

Almost surely, 2^116581517 is an apocalyptic number.

It is an amenable number.

116581517 is a deficient number, since it is larger than the sum of its proper divisors (8967823).

116581517 is an equidigital number, since it uses as much as digits as its factorization.

116581517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8967822.

The product of its digits is 8400, while the sum is 35.

The square root of 116581517 is about 10797.2921142294. The cubic root of 116581517 is about 488.5134972089.

The spelling of 116581517 in words is "one hundred sixteen million, five hundred eighty-one thousand, five hundred seventeen".