116131681 has 4 divisors (see below), whose sum is σ = 116482864. Its totient is φ = 115780500.

The previous prime is 116131663. The next prime is 116131733. The reversal of 116131681 is 186131611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186131611 = 2411 ⋅77201.

It is a cyclic number.

It is not a de Polignac number, because 116131681 - 2⁵ = 116131649 is a prime.

It is a super-2 number, since 2×116131681² = 26973134663771522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116131621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175095 + ... + 175756.

It is an arithmetic number, because the mean of its divisors is an integer number (29120716).

Almost surely, 2^116131681 is an apocalyptic number.

It is an amenable number.

116131681 is a deficient number, since it is larger than the sum of its proper divisors (351183).

116131681 is an equidigital number, since it uses as much as digits as its factorization.

116131681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351182.

The product of its digits is 864, while the sum is 28.

The square root of 116131681 is about 10776.4410173304. The cubic root of 116131681 is about 487.8843688791.

The spelling of 116131681 in words is "one hundred sixteen million, one hundred thirty-one thousand, six hundred eighty-one".