16181226 has 24 divisors (see below), whose sum is σ = 35636484. Its totient is φ = 5304960.

The previous prime is 16181203. The next prime is 16181227. The reversal of 16181226 is 62218161.

It can be written as a sum of positive squares in 2 ways, for example, as 15992001 + 189225 = 3999^2 + 435^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16181226.

It is not an unprimeable number, because it can be changed into a prime (16181227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6271 + ... + 8466.

Almost surely, 2^16181226 is an apocalyptic number.

16181226 is an abundant number, since it is smaller than the sum of its proper divisors (19455258).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16181226 is a wasteful number, since it uses less digits than its factorization.

16181226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14806 (or 14803 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 16181226 is about 4022.5894645116. The cubic root of 16181226 is about 252.9320173334.

Adding to 16181226 its reverse (62218161), we get a palindrome (78399387).

The spelling of 16181226 in words is "sixteen million, one hundred eighty-one thousand, two hundred twenty-six".