6539038221 has 16 divisors (see below), whose sum is σ = 8749454400. Its totient is φ = 4344012288.

The previous prime is 6539038199. The next prime is 6539038229. The reversal of 6539038221 is 1228309356.

6539038221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6539038221 - 2¹⁴ = 6539021837 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6539038221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6539038229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1927795 + ... + 1931183.

It is an arithmetic number, because the mean of its divisors is an integer number (546840900).

Almost surely, 2^6539038221 is an apocalyptic number.

It is an amenable number.

6539038221 is a deficient number, since it is larger than the sum of its proper divisors (2210416179).

6539038221 is a wasteful number, since it uses less digits than its factorization.

6539038221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5468.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 6539038221 is about 80864.3198264847. The cubic root of 6539038221 is about 1869.9842927179.

The spelling of 6539038221 in words is "six billion, five hundred thirty-nine million, thirty-eight thousand, two hundred twenty-one".