181226026 has 4 divisors (see below), whose sum is σ = 271839042. Its totient is φ = 90613012.

The previous prime is 181226011. The next prime is 181226029. The reversal of 181226026 is 620622181.

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., 126540001 + 54686025 = 11249^2 + 7395^2 .

It is a junction number, because it is equal to n+sod(n) for n = 181225985 and 181226003.

It is not an unprimeable number, because it can be changed into a prime (181226029) 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 as a sum of consecutive naturals, namely, 45306505 + ... + 45306508.

Almost surely, 2^181226026 is an apocalyptic number.

181226026 is a deficient number, since it is larger than the sum of its proper divisors (90613016).

181226026 is an equidigital number, since it uses as much as digits as its factorization.

181226026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90613015.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 181226026 is about 13462.0216163844. The cubic root of 181226026 is about 565.9006451566.

The spelling of 181226026 in words is "one hundred eighty-one million, two hundred twenty-six thousand, twenty-six".