8251202521 has 2 divisors, whose sum is σ = 8251202522. Its totient is φ = 8251202520.

The previous prime is 8251202497. The next prime is 8251202537. The reversal of 8251202521 is 1252021528.

8251202521 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., 5146484121 + 3104718400 = 71739^2 + 55720^2 .

It is a cyclic number.

It is not a de Polignac number, because 8251202521 - 2⁵ = 8251202489 is a prime.

It is a super-3 number, since 3×8251202521³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8251202521.

It is not a weakly prime, because it can be changed into another prime (8251202581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4125601260 + 4125601261.

It is an arithmetic number, because the mean of its divisors is an integer number (4125601261).

Almost surely, 2^8251202521 is an apocalyptic number.

It is an amenable number.

8251202521 is a deficient number, since it is larger than the sum of its proper divisors (1).

8251202521 is an equidigital number, since it uses as much as digits as its factorization.

8251202521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 28.

The square root of 8251202521 is about 90836.1300419607. The cubic root of 8251202521 is about 2020.7181808140.

The spelling of 8251202521 in words is "eight billion, two hundred fifty-one million, two hundred two thousand, five hundred twenty-one".