2798144221 has 2 divisors, whose sum is σ = 2798144222. Its totient is φ = 2798144220.

The previous prime is 2798144197. The next prime is 2798144303. The reversal of 2798144221 is 1224418972.

2798144221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2676924121 + 121220100 = 51739^2 + 11010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2798144221 - 2⁹ = 2798143709 is a prime.

It is a super-2 number, since 2×2798144221² = 15659222163031393682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2798144621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1399072110 + 1399072111.

It is an arithmetic number, because the mean of its divisors is an integer number (1399072111).

Almost surely, 2^2798144221 is an apocalyptic number.

It is an amenable number.

2798144221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2798144221 is an equidigital number, since it uses as much as digits as its factorization.

2798144221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 2798144221 is about 52897.4878515039. The cubic root of 2798144221 is about 1409.1482911896.

The spelling of 2798144221 in words is "two billion, seven hundred ninety-eight million, one hundred forty-four thousand, two hundred twenty-one".