2755238821 has 2 divisors, whose sum is σ = 2755238822. Its totient is φ = 2755238820.

The previous prime is 2755238809. The next prime is 2755238891. The reversal of 2755238821 is 1288325572.

2755238821 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., 2622873796 + 132365025 = 51214^2 + 11505^2 .

It is a cyclic number.

It is not a de Polignac number, because 2755238821 - 2¹⁵ = 2755206053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2755238891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1377619410 + 1377619411.

It is an arithmetic number, because the mean of its divisors is an integer number (1377619411).

Almost surely, 2^2755238821 is an apocalyptic number.

It is an amenable number.

2755238821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2755238821 is an equidigital number, since it uses as much as digits as its factorization.

2755238821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 43.

The square root of 2755238821 is about 52490.3688403882. The cubic root of 2755238821 is about 1401.9087605281.

The spelling of 2755238821 in words is "two billion, seven hundred fifty-five million, two hundred thirty-eight thousand, eight hundred twenty-one".