181116226 has 4 divisors (see below), whose sum is σ = 271674342. Its totient is φ = 90558112.

The previous prime is 181116217. The next prime is 181116233. The reversal of 181116226 is 622611181.

181116226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 152547201 + 28569025 = 12351^2 + 5345^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181116194 and 181116203.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45279055 + ... + 45279058.

Almost surely, 2^181116226 is an apocalyptic number.

181116226 is a deficient number, since it is larger than the sum of its proper divisors (90558116).

181116226 is an equidigital number, since it uses as much as digits as its factorization.

181116226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90558115.

The product of its digits is 1152, while the sum is 28.

The square root of 181116226 is about 13457.9428591446. The cubic root of 181116226 is about 565.7863340479.

The spelling of 181116226 in words is "one hundred eighty-one million, one hundred sixteen thousand, two hundred twenty-six".