83081822221 has 4 divisors (see below), whose sum is σ = 87968988252. Its totient is φ = 78194656192.

The previous prime is 83081822179. The next prime is 83081822227. The reversal of 83081822221 is 12222818038.

It is a happy number.

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 44081102025 + 39000720196 = 209955^2 + 197486^2 .

It is a cyclic number.

It is not a de Polignac number, because 83081822221 - 2⁹ = 83081821709 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 (83081822227) 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, 2443582990 + ... + 2443583023.

It is an arithmetic number, because the mean of its divisors is an integer number (21992247063).

Almost surely, 2^83081822221 is an apocalyptic number.

It is an amenable number.

83081822221 is a deficient number, since it is larger than the sum of its proper divisors (4887166031).

83081822221 is a wasteful number, since it uses less digits than its factorization.

83081822221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4887166030.

The product of its (nonzero) digits is 24576, while the sum is 37.

The spelling of 83081822221 in words is "eighty-three billion, eighty-one million, eight hundred twenty-two thousand, two hundred twenty-one".