83133638221 has 4 divisors (see below), whose sum is σ = 88023852252. Its totient is φ = 78243424192.

The previous prime is 83133638201. The next prime is 83133638227. The reversal of 83133638221 is 12283633138.

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 45790008196 + 37343630025 = 213986^2 + 193245^2 .

It is a cyclic number.

It is not a de Polignac number, because 83133638221 - 2²¹ = 83131541069 is a prime.

It is a super-2 number, since 2×83133638221² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83133638227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2445106990 + ... + 2445107023.

It is an arithmetic number, because the mean of its divisors is an integer number (22005963063).

Almost surely, 2^83133638221 is an apocalyptic number.

It is an amenable number.

83133638221 is a deficient number, since it is larger than the sum of its proper divisors (4890214031).

83133638221 is a wasteful number, since it uses less digits than its factorization.

83133638221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4890214030.

The product of its digits is 124416, while the sum is 40.

The spelling of 83133638221 in words is "eighty-three billion, one hundred thirty-three million, six hundred thirty-eight thousand, two hundred twenty-one".