2221256226 has 64 divisors (see below), whose sum is σ = 5167669248. Its totient is φ = 623386368.

The previous prime is 2221256207. The next prime is 2221256231. The reversal of 2221256226 is 6226521222.

It is a junction number, because it is equal to n+sod(n) for n = 2221256193 and 2221256202.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1217551 + ... + 1219373.

It is an arithmetic number, because the mean of its divisors is an integer number (80744832).

Almost surely, 2^2221256226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221256226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2583834624).

2221256226 is an abundant number, since it is smaller than the sum of its proper divisors (2946413022).

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

2221256226 is a wasteful number, since it uses less digits than its factorization.

2221256226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335.

The product of its digits is 11520, while the sum is 30.

The square root of 2221256226 is about 47130.2050281982. The cubic root of 2221256226 is about 1304.7667656168.

Adding to 2221256226 its reverse (6226521222), we get a palindrome (8447777448).

The spelling of 2221256226 in words is "two billion, two hundred twenty-one million, two hundred fifty-six thousand, two hundred twenty-six".