7282438021 has 2 divisors, whose sum is σ = 7282438022. Its totient is φ = 7282438020.

The previous prime is 7282438001. The next prime is 7282438039. The reversal of 7282438021 is 1208342827.

7282438021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6354321796 + 928116225 = 79714^2 + 30465^2 .

It is an emirp because it is prime and its reverse (1208342827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7282438021 - 2¹³ = 7282429829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7282438001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3641219010 + 3641219011.

It is an arithmetic number, because the mean of its divisors is an integer number (3641219011).

Almost surely, 2^7282438021 is an apocalyptic number.

It is an amenable number.

7282438021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7282438021 is an equidigital number, since it uses as much as digits as its factorization.

7282438021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 7282438021 is about 85337.2018582752. The cubic root of 7282438021 is about 1938.3205450478.

The spelling of 7282438021 in words is "seven billion, two hundred eighty-two million, four hundred thirty-eight thousand, twenty-one".