2678224221 has 24 divisors (see below), whose sum is σ = 3907077720. Its totient is φ = 1767782016.

The previous prime is 2678224193. The next prime is 2678224271. The reversal of 2678224221 is 1224228762.

It can be written as a sum of positive squares in 4 ways, for example, as 209525625 + 2468698596 = 14475^2 + 49686^2 .

It is not a de Polignac number, because 2678224221 - 2⁵ = 2678224189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2678224271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 410775 + ... + 417243.

It is an arithmetic number, because the mean of its divisors is an integer number (162794905).

Almost surely, 2^2678224221 is an apocalyptic number.

It is an amenable number.

2678224221 is a deficient number, since it is larger than the sum of its proper divisors (1228853499).

2678224221 is a wasteful number, since it uses less digits than its factorization.

2678224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925 (or 6922 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 2678224221 is about 51751.5624981507. The cubic root of 2678224221 is about 1388.7230515140.

The spelling of 2678224221 in words is "two billion, six hundred seventy-eight million, two hundred twenty-four thousand, two hundred twenty-one".