7225072226521 has 2 divisors, whose sum is σ = 7225072226522. Its totient is φ = 7225072226520.

The previous prime is 7225072226507. The next prime is 7225072226531. The reversal of 7225072226521 is 1256222705227.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6636574584025 + 588497642496 = 2576155^2 + 767136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7225072226521 is a prime.

It is not a weakly prime, because it can be changed into another prime (7225072226531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3612536113260 + 3612536113261.

It is an arithmetic number, because the mean of its divisors is an integer number (3612536113261).

Almost surely, 2^{7225072226521} is an apocalyptic number.

It is an amenable number.

7225072226521 is a deficient number, since it is larger than the sum of its proper divisors (1).

7225072226521 is an equidigital number, since it uses as much as digits as its factorization.

7225072226521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 470400, while the sum is 43.

The spelling of 7225072226521 in words is "seven trillion, two hundred twenty-five billion, seventy-two million, two hundred twenty-six thousand, five hundred twenty-one".