525572521 has 2 divisors, whose sum is σ = 525572522. Its totient is φ = 525572520.

The previous prime is 525572497. The next prime is 525572549. The reversal of 525572521 is 125275525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 404814400 + 120758121 = 20120^2 + 10989^2 .

It is a cyclic number.

It is not a de Polignac number, because 525572521 - 2¹¹ = 525570473 is a prime.

It is not a weakly prime, because it can be changed into another prime (525572591) 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, 262786260 + 262786261.

It is an arithmetic number, because the mean of its divisors is an integer number (262786261).

Almost surely, 2^525572521 is an apocalyptic number.

It is an amenable number.

525572521 is a deficient number, since it is larger than the sum of its proper divisors (1).

525572521 is an equidigital number, since it uses as much as digits as its factorization.

525572521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35000, while the sum is 34.

The square root of 525572521 is about 22925.3685030361. The cubic root of 525572521 is about 807.0074614908.

The spelling of 525572521 in words is "five hundred twenty-five million, five hundred seventy-two thousand, five hundred twenty-one".