83022221 has 8 divisors (see below), whose sum is σ = 84768120. Its totient is φ = 81283072.

The previous prime is 83022209. The next prime is 83022227. The reversal of 83022221 is 12222038.

It can be written as a sum of positive squares in 4 ways, for example, as 25110121 + 57912100 = 5011^2 + 7610^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-83022221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 83022193 and 83022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83022227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28781 + ... + 31533.

It is an arithmetic number, because the mean of its divisors is an integer number (10596015).

Almost surely, 2^83022221 is an apocalyptic number.

It is an amenable number.

83022221 is a deficient number, since it is larger than the sum of its proper divisors (1745899).

83022221 is a wasteful number, since it uses less digits than its factorization.

83022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3375.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 83022221 is about 9111.6530333414. The cubic root of 83022221 is about 436.2459912112.

Adding to 83022221 its reverse (12222038), we get a palindrome (95244259).

The spelling of 83022221 in words is "eighty-three million, twenty-two thousand, two hundred twenty-one".