252525570715721 has 2 divisors, whose sum is σ = 252525570715722. Its totient is φ = 252525570715720.

The previous prime is 252525570715681. The next prime is 252525570715843. The reversal of 252525570715721 is 127517075525252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 224135002957321 + 28390567758400 = 14971139^2 + 5328280^2 .

It is a cyclic number.

It is not a de Polignac number, because 252525570715721 - 2⁶ = 252525570715657 is a prime.

It is not a weakly prime, because it can be changed into another prime (252525572715721) 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, 126262785357860 + 126262785357861.

It is an arithmetic number, because the mean of its divisors is an integer number (126262785357861).

Almost surely, 2^{252525570715721} is an apocalyptic number.

It is an amenable number.

252525570715721 is a deficient number, since it is larger than the sum of its proper divisors (1).

252525570715721 is an equidigital number, since it uses as much as digits as its factorization.

252525570715721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17150000, while the sum is 56.

The spelling of 252525570715721 in words is "two hundred fifty-two trillion, five hundred twenty-five billion, five hundred seventy million, seven hundred fifteen thousand, seven hundred twenty-one".