525221017 has 2 divisors, whose sum is σ = 525221018. Its totient is φ = 525221016.

The previous prime is 525220991. The next prime is 525221027. The reversal of 525221017 is 710122525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278856601 + 246364416 = 16699^2 + 15696^2 .

It is a cyclic number.

It is not a de Polignac number, because 525221017 - 2²³ = 516832409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 525220982 and 525221000.

It is not a weakly prime, because it can be changed into another prime (525221027) 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, 262610508 + 262610509.

It is an arithmetic number, because the mean of its divisors is an integer number (262610509).

Almost surely, 2^525221017 is an apocalyptic number.

It is an amenable number.

525221017 is a deficient number, since it is larger than the sum of its proper divisors (1).

525221017 is an equidigital number, since it uses as much as digits as its factorization.

525221017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 525221017 is about 22917.7009536297. The cubic root of 525221017 is about 806.8275119426.

The spelling of 525221017 in words is "five hundred twenty-five million, two hundred twenty-one thousand, seventeen".