528245521 has 8 divisors (see below), whose sum is σ = 531576000. Its totient is φ = 524924400.

The previous prime is 528245519. The next prime is 528245533. The reversal of 528245521 is 125542825.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 528245521 - 2¹ = 528245519 is a prime.

It is a super-2 number, since 2×528245521² = 558086660913122882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (528245561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135246 + ... + 139096.

It is an arithmetic number, because the mean of its divisors is an integer number (66447000).

Almost surely, 2^528245521 is an apocalyptic number.

It is an amenable number.

528245521 is a deficient number, since it is larger than the sum of its proper divisors (3330479).

528245521 is a wasteful number, since it uses less digits than its factorization.

528245521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4679.

The product of its digits is 32000, while the sum is 34.

The square root of 528245521 is about 22983.5924302534. The cubic root of 528245521 is about 808.3732636620.

The spelling of 528245521 in words is "five hundred twenty-eight million, two hundred forty-five thousand, five hundred twenty-one".