525016521 has 24 divisors (see below), whose sum is σ = 778161384. Its totient is φ = 340899840.

The previous prime is 525016519. The next prime is 525016543. The reversal of 525016521 is 125610525.

525016521 is a `hidden beast` number, since 5 + 2 + 5 + 0 + 1 + 652 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 66585600 + 458430921 = 8160^2 + 21411^2 .

It is not a de Polignac number, because 525016521 - 2¹ = 525016519 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (525016501) 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 in 23 ways as a sum of consecutive naturals, for example, 404145 + ... + 405441.

It is an arithmetic number, because the mean of its divisors is an integer number (32423391).

Almost surely, 2^525016521 is an apocalyptic number.

It is an amenable number.

525016521 is a deficient number, since it is larger than the sum of its proper divisors (253144863).

525016521 is a wasteful number, since it uses less digits than its factorization.

525016521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2441 (or 2438 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 525016521 is about 22913.2389897195. The cubic root of 525016521 is about 806.7227849726.

The spelling of 525016521 in words is "five hundred twenty-five million, sixteen thousand, five hundred twenty-one".