2228827681 has 4 divisors (see below), whose sum is σ = 2241711252. Its totient is φ = 2215944112.

The previous prime is 2228827649. The next prime is 2228827693. The reversal of 2228827681 is 1867288222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1939521600 + 289306081 = 44040^2 + 17009^2 .

It is a cyclic number.

It is not a de Polignac number, because 2228827681 - 2⁵ = 2228827649 is a prime.

It is a super-2 number, since 2×2228827681² = 9935345663183675522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2228827621) 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, 6441526 + ... + 6441871.

It is an arithmetic number, because the mean of its divisors is an integer number (560427813).

Almost surely, 2^2228827681 is an apocalyptic number.

It is an amenable number.

2228827681 is a deficient number, since it is larger than the sum of its proper divisors (12883571).

2228827681 is a wasteful number, since it uses less digits than its factorization.

2228827681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12883570.

The product of its digits is 344064, while the sum is 46.

The square root of 2228827681 is about 47210.4615630900. The cubic root of 2228827681 is about 1306.2475762384.

The spelling of 2228827681 in words is "two billion, two hundred twenty-eight million, eight hundred twenty-seven thousand, six hundred eighty-one".