535821621 has 16 divisors (see below), whose sum is σ = 727179648. Its totient is φ = 350856000.

The previous prime is 535821619. The next prime is 535821631. The reversal of 535821621 is 126128535.

It is not a de Polignac number, because 535821621 - 2¹ = 535821619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535821631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160671 + ... + 163971.

It is an arithmetic number, because the mean of its divisors is an integer number (45448728).

Almost surely, 2^535821621 is an apocalyptic number.

It is an amenable number.

535821621 is a deficient number, since it is larger than the sum of its proper divisors (191358027).

535821621 is a wasteful number, since it uses less digits than its factorization.

535821621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4252.

The product of its digits is 14400, while the sum is 33.

The square root of 535821621 is about 23147.8210853635. The cubic root of 535821621 is about 812.2194987865.

The spelling of 535821621 in words is "five hundred thirty-five million, eight hundred twenty-one thousand, six hundred twenty-one".