533128457221 has 4 divisors (see below), whose sum is σ = 533140473292. Its totient is φ = 533116441152.

The previous prime is 533128457207. The next prime is 533128457231. The reversal of 533128457221 is 122754821335.

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 187514980900 + 345613476321 = 433030^2 + 587889^2 .

It is a cyclic number.

It is not a de Polignac number, because 533128457221 - 2⁷ = 533128457093 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 (533128457231) 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, 5941236 + ... + 6030301.

It is an arithmetic number, because the mean of its divisors is an integer number (133285118323).

Almost surely, 2^533128457221 is an apocalyptic number.

It is an amenable number.

533128457221 is a deficient number, since it is larger than the sum of its proper divisors (12016071).

533128457221 is a wasteful number, since it uses less digits than its factorization.

533128457221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12016070.

The product of its digits is 403200, while the sum is 43.

The spelling of 533128457221 in words is "five hundred thirty-three billion, one hundred twenty-eight million, four hundred fifty-seven thousand, two hundred twenty-one".