528041821 has 4 divisors (see below), whose sum is σ = 528265792. Its totient is φ = 527817852.

The previous prime is 528041819. The next prime is 528041827. The reversal of 528041821 is 128140825.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 528041821 - 2¹ = 528041819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (528041827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108411 + ... + 113176.

It is an arithmetic number, because the mean of its divisors is an integer number (132066448).

Almost surely, 2^528041821 is an apocalyptic number.

It is an amenable number.

528041821 is a deficient number, since it is larger than the sum of its proper divisors (223971).

528041821 is a wasteful number, since it uses less digits than its factorization.

528041821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223970.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 528041821 is about 22979.1605808393. The cubic root of 528041821 is about 808.2693430432.

The spelling of 528041821 in words is "five hundred twenty-eight million, forty-one thousand, eight hundred twenty-one".