533421020521 has 4 divisors (see below), whose sum is σ = 543485568132. Its totient is φ = 523356472912.

The previous prime is 533421020471. The next prime is 533421020537. The reversal of 533421020521 is 125020124335.

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 410290210521 + 123130810000 = 640539^2 + 350900^2 .

It is a cyclic number.

It is not a de Polignac number, because 533421020521 - 2⁹ = 533421020009 is a prime.

It is a super-2 number, since 2×533421020521² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 533421020521.

It is not an unprimeable number, because it can be changed into a prime (533421027521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5032273726 + ... + 5032273831.

It is an arithmetic number, because the mean of its divisors is an integer number (135871392033).

Almost surely, 2^533421020521 is an apocalyptic number.

It is an amenable number.

533421020521 is a deficient number, since it is larger than the sum of its proper divisors (10064547611).

533421020521 is a wasteful number, since it uses less digits than its factorization.

533421020521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10064547610.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 533421020521 its reverse (125020124335), we get a palindrome (658441144856).

The spelling of 533421020521 in words is "five hundred thirty-three billion, four hundred twenty-one million, twenty thousand, five hundred twenty-one".