116138281 has 12 divisors (see below), whose sum is σ = 138397140. Its totient is φ = 97117440.

The previous prime is 116138273. The next prime is 116138291. The reversal of 116138281 is 182831611.

It can be written as a sum of positive squares in 2 ways, for example, as 24840256 + 91298025 = 4984^2 + 9555^2 .

It is not a de Polignac number, because 116138281 - 2³ = 116138273 is a prime.

It is a super-2 number, since 2×116138281² = 26976200627269922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (116138221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26896 + ... + 30913.

It is an arithmetic number, because the mean of its divisors is an integer number (11533095).

Almost surely, 2^116138281 is an apocalyptic number.

It is an amenable number.

116138281 is a deficient number, since it is larger than the sum of its proper divisors (22258859).

116138281 is an equidigital number, since it uses as much as digits as its factorization.

116138281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57864 (or 57857 counting only the distinct ones).

The product of its digits is 2304, while the sum is 31.

The square root of 116138281 is about 10776.7472365274. The cubic root of 116138281 is about 487.8936111916.

Adding to 116138281 its reverse (182831611), we get a palindrome (298969892).

The spelling of 116138281 in words is "one hundred sixteen million, one hundred thirty-eight thousand, two hundred eighty-one".