528665105 has 4 divisors (see below), whose sum is σ = 634398132. Its totient is φ = 422932080.

The previous prime is 528665087. The next prime is 528665129. The reversal of 528665105 is 501566825.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59336209 + 469328896 = 7703^2 + 21664^2 .

It is not a de Polignac number, because 528665105 - 2¹⁸ = 528402961 is a prime.

It is a super-2 number, since 2×528665105² = 558973586489322050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52866506 + ... + 52866515.

It is an arithmetic number, because the mean of its divisors is an integer number (158599533).

Almost surely, 2^528665105 is an apocalyptic number.

It is an amenable number.

528665105 is a deficient number, since it is larger than the sum of its proper divisors (105733027).

528665105 is a wasteful number, since it uses less digits than its factorization.

528665105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105733026.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 528665105 is about 22992.7185213058. The cubic root of 528665105 is about 808.5872365908.

The spelling of 528665105 in words is "five hundred twenty-eight million, six hundred sixty-five thousand, one hundred five".