7273225021 has 2 divisors, whose sum is σ = 7273225022. Its totient is φ = 7273225020.

The previous prime is 7273224989. The next prime is 7273225051. The reversal of 7273225021 is 1205223727.

7273225021 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., 7261425796 + 11799225 = 85214^2 + 3435^2 .

It is an emirp because it is prime and its reverse (1205223727) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7273225021 - 2⁵ = 7273224989 is a prime.

It is a super-2 number, since 2×7273225021² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7273225051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3636612510 + 3636612511.

It is an arithmetic number, because the mean of its divisors is an integer number (3636612511).

Almost surely, 2^7273225021 is an apocalyptic number.

It is an amenable number.

7273225021 is a deficient number, since it is larger than the sum of its proper divisors (1).

7273225021 is an equidigital number, since it uses as much as digits as its factorization.

7273225021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 31.

The square root of 7273225021 is about 85283.2048002419. The cubic root of 7273225021 is about 1937.5028114340.

Adding to 7273225021 its reverse (1205223727), we get a palindrome (8478448748).

The spelling of 7273225021 in words is "seven billion, two hundred seventy-three million, two hundred twenty-five thousand, twenty-one".