6538221103 has 4 divisors (see below), whose sum is σ = 6540072120. Its totient is φ = 6536370088.

The previous prime is 6538221101. The next prime is 6538221127. The reversal of 6538221103 is 3011228356.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6538221103 - 2¹ = 6538221101 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 (6538221101) 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, 920200 + ... + 927277.

It is an arithmetic number, because the mean of its divisors is an integer number (1635018030).

Almost surely, 2^6538221103 is an apocalyptic number.

6538221103 is a deficient number, since it is larger than the sum of its proper divisors (1851017).

6538221103 is a wasteful number, since it uses less digits than its factorization.

6538221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851016.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6538221103 is about 80859.2672672712. The cubic root of 6538221103 is about 1869.9063984148.

Adding to 6538221103 its reverse (3011228356), we get a palindrome (9549449459).

The spelling of 6538221103 in words is "six billion, five hundred thirty-eight million, two hundred twenty-one thousand, one hundred three".