116228181 has 4 divisors (see below), whose sum is σ = 154970912. Its totient is φ = 77485452.

The previous prime is 116228179. The next prime is 116228209. The reversal of 116228181 is 181822611.

It is a happy number.

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: 181822611 = 3 ⋅60607537.

It is not a de Polignac number, because 116228181 - 2¹ = 116228179 is a prime.

It is a super-2 number, since 2×116228181² = 27017980117137522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116223181) 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, 19371361 + ... + 19371366.

It is an arithmetic number, because the mean of its divisors is an integer number (38742728).

Almost surely, 2^116228181 is an apocalyptic number.

It is an amenable number.

116228181 is a deficient number, since it is larger than the sum of its proper divisors (38742731).

116228181 is an equidigital number, since it uses as much as digits as its factorization.

116228181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38742730.

The product of its digits is 1536, while the sum is 30.

The square root of 116228181 is about 10780.9174470450. The cubic root of 116228181 is about 488.0194678362.

The spelling of 116228181 in words is "one hundred sixteen million, two hundred twenty-eight thousand, one hundred eighty-one".